157188971665 has 8 divisors (see below), whose sum is σ = 205774653888. Its totient is φ = 114319252080.

The previous prime is 157188971657. The next prime is 157188971699. The reversal of 157188971665 is 566179881751.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 157188971665 - 2³ = 157188971657 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157188971597 and 157188971606.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1428990597 + ... + 1428990706.

It is an arithmetic number, because the mean of its divisors is an integer number (25721831736).

Almost surely, 2^157188971665 is an apocalyptic number.

It is an amenable number.

157188971665 is a deficient number, since it is larger than the sum of its proper divisors (48585682223).

157188971665 is a wasteful number, since it uses less digits than its factorization.

157188971665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857981319.

The product of its digits is 25401600, while the sum is 64.

The spelling of 157188971665 in words is "one hundred fifty-seven billion, one hundred eighty-eight million, nine hundred seventy-one thousand, six hundred sixty-five".