157812868 has 6 divisors (see below), whose sum is σ = 276172526. Its totient is φ = 78906432.

The previous prime is 157812859. The next prime is 157812869. The reversal of 157812868 is 868218751.

It can be written as a sum of positive squares in only one way, i.e., 149621824 + 8191044 = 12232^2 + 2862^2 .

It is not an unprimeable number, because it can be changed into a prime (157812869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19726605 + ... + 19726612.

Almost surely, 2^157812868 is an apocalyptic number.

It is an amenable number.

157812868 is a deficient number, since it is larger than the sum of its proper divisors (118359658).

157812868 is a wasteful number, since it uses less digits than its factorization.

157812868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39453221 (or 39453219 counting only the distinct ones).

The product of its digits is 215040, while the sum is 46.

The square root of 157812868 is about 12562.3591733400. The cubic root of 157812868 is about 540.3985032840.

The spelling of 157812868 in words is "one hundred fifty-seven million, eight hundred twelve thousand, eight hundred sixty-eight".