189907999952 has 20 divisors (see below), whose sum is σ = 401396454816. Its totient is φ = 86321818080.

The previous prime is 189907999951. The next prime is 189907999979. The reversal of 189907999952 is 259999709981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189907999951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 539511188 + ... + 539511539.

Almost surely, 2^189907999952 is an apocalyptic number.

It is an amenable number.

189907999952 is an abundant number, since it is smaller than the sum of its proper divisors (211488454864).

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

189907999952 is a wasteful number, since it uses less digits than its factorization.

189907999952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1079022746 (or 1079022740 counting only the distinct ones).

The product of its (nonzero) digits is 297606960, while the sum is 77.

The spelling of 189907999952 in words is "one hundred eighty-nine billion, nine hundred seven million, nine hundred ninety-nine thousand, nine hundred fifty-two".