189268994520 has 64 divisors (see below), whose sum is σ = 630896652000. Its totient is φ = 50471731584.

The previous prime is 189268994507. The next prime is 189268994521. The reversal of 189268994520 is 25499862981.

189268994520 is a `hidden beast` number, since 1 + 8 + 9 + 26 + 89 + 9 + 4 + 520 = 666.

It is a super-2 number, since 2×189268994520² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189268994521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87623455 + ... + 87625614.

Almost surely, 2^189268994520 is an apocalyptic number.

189268994520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189268994520 is an abundant number, since it is smaller than the sum of its proper divisors (441627657480).

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

189268994520 is a wasteful number, since it uses less digits than its factorization.

189268994520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175249089 (or 175249079 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 189268994520 in words is "one hundred eighty-nine billion, two hundred sixty-eight million, nine hundred ninety-four thousand, five hundred twenty".