164402843490 has 24 divisors (see below), whose sum is σ = 427447393308. Its totient is φ = 43840758240.

The previous prime is 164402843471. The next prime is 164402843519. The reversal of 164402843490 is 94348204461.

164402843490 is a `hidden beast` number, since 1 + 64 + 40 + 28 + 43 + 490 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 164367808929 + 35034561 = 405423^2 + 5919^2 .

It is a super-3 number, since 3×164402843490³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 913349041 + ... + 913349220.

Almost surely, 2^164402843490 is an apocalyptic number.

164402843490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

164402843490 is an abundant number, since it is smaller than the sum of its proper divisors (263044549818).

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

164402843490 is a wasteful number, since it uses less digits than its factorization.

164402843490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1826698274 (or 1826698271 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 45.

The spelling of 164402843490 in words is "one hundred sixty-four billion, four hundred two million, eight hundred forty-three thousand, four hundred ninety".