157157221508 has 12 divisors (see below), whose sum is σ = 314314443072. Its totient is φ = 67353094920.

The previous prime is 157157221469. The next prime is 157157221513. The reversal of 157157221508 is 805122751751.

157157221508 is an admirable number.

It is a super-2 number, since 2×157157221508² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2806378928 + ... + 2806378983.

It is an arithmetic number, because the mean of its divisors is an integer number (26192870256).

Almost surely, 2^157157221508 is an apocalyptic number.

It is an amenable number.

157157221508 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

157157221508 is a wasteful number, since it uses less digits than its factorization.

157157221508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612757922 (or 5612757920 counting only the distinct ones).

The product of its (nonzero) digits is 196000, while the sum is 44.

The spelling of 157157221508 in words is "one hundred fifty-seven billion, one hundred fifty-seven million, two hundred twenty-one thousand, five hundred eight".