157680538 has 8 divisors (see below), whose sum is σ = 237039732. Its totient is φ = 78667296.

The previous prime is 157680529. The next prime is 157680553. The reversal of 157680538 is 835086751.

It can be written as a sum of positive squares in 2 ways, for example, as 156175009 + 1505529 = 12497^2 + 1227^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 157680494 and 157680503.

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, 85345 + ... + 87172.

Almost surely, 2^157680538 is an apocalyptic number.

157680538 is a deficient number, since it is larger than the sum of its proper divisors (79359194).

157680538 is a wasteful number, since it uses less digits than its factorization.

157680538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172976.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 157680538 is about 12557.0911440508. The cubic root of 157680538 is about 540.2474152009.

The spelling of 157680538 in words is "one hundred fifty-seven million, six hundred eighty thousand, five hundred thirty-eight".