163550138400 has 432 divisors, whose sum is σ = 630180165888. Its totient is φ = 39583488000.

The previous prime is 163550138387. The next prime is 163550138431. The reversal of 163550138400 is 4831055361.

163550138400 is a `hidden beast` number, since 1 + 63 + 550 + 1 + 3 + 8 + 40 + 0 = 666.

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

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 63121105 + ... + 63123695.

It is an arithmetic number, because the mean of its divisors is an integer number (1458750384).

Almost surely, 2^163550138400 is an apocalyptic number.

163550138400 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 163550138400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315090082944).

163550138400 is an abundant number, since it is smaller than the sum of its proper divisors (466630027488).

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

163550138400 is a wasteful number, since it uses less digits than its factorization.

163550138400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425 (or 3409 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 163550138400 in words is "one hundred sixty-three billion, five hundred fifty million, one hundred thirty-eight thousand, four hundred".