163402237440 has 1280 divisors, whose sum is σ = 697905331200. Its totient is φ = 35799957504.

The previous prime is 163402237391. The next prime is 163402237441. The reversal of 163402237440 is 44732204361.

163402237440 is a `hidden beast` number, since 16 + 3 + 402 + 237 + 4 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1280).

It is a super-3 number, since 3×163402237440³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 163402237395 and 163402237404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163402237441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 290234599 + ... + 290235161.

It is an arithmetic number, because the mean of its divisors is an integer number (545238540).

Almost surely, 2^163402237440 is an apocalyptic number.

163402237440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163402237440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (348952665600).

163402237440 is an abundant number, since it is smaller than the sum of its proper divisors (534503093760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163402237440 is a wasteful number, since it uses less digits than its factorization.

163402237440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 622 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 36.

The spelling of 163402237440 in words is "one hundred sixty-three billion, four hundred two million, two hundred thirty-seven thousand, four hundred forty".