157990257189 has 8 divisors (see below), whose sum is σ = 234059640320. Its totient is φ = 105326838108.

The previous prime is 157990257157. The next prime is 157990257203. The reversal of 157990257189 is 981752099751.

157990257189 is a `hidden beast` number, since 1 + 57 + 9 + 9 + 0 + 2 + 571 + 8 + 9 = 666.

It is not a de Polignac number, because 157990257189 - 2⁵ = 157990257157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157990257589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2925745477 + ... + 2925745530.

It is an arithmetic number, because the mean of its divisors is an integer number (29257455040).

Almost surely, 2^157990257189 is an apocalyptic number.

It is an amenable number.

157990257189 is a deficient number, since it is larger than the sum of its proper divisors (76069383131).

157990257189 is an equidigital number, since it uses as much as digits as its factorization.

157990257189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5851491016 (or 5851491010 counting only the distinct ones).

The product of its (nonzero) digits is 14288400, while the sum is 63.

The spelling of 157990257189 in words is "one hundred fifty-seven billion, nine hundred ninety million, two hundred fifty-seven thousand, one hundred eighty-nine".