157157578 has 4 divisors (see below), whose sum is σ = 235736370. Its totient is φ = 78578788.

The previous prime is 157157563. The next prime is 157157579. The reversal of 157157578 is 875751751.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 140730769 + 16426809 = 11863^2 + 4053^2 .

It is not an unprimeable number, because it can be changed into a prime (157157579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39289393 + ... + 39289396.

Almost surely, 2^157157578 is an apocalyptic number.

157157578 is a deficient number, since it is larger than the sum of its proper divisors (78578792).

157157578 is an equidigital number, since it uses as much as digits as its factorization.

157157578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78578791.

The product of its digits is 343000, while the sum is 46.

The square root of 157157578 is about 12536.2505558879. The cubic root of 157157578 is about 539.6494959088.

The spelling of 157157578 in words is "one hundred fifty-seven million, one hundred fifty-seven thousand, five hundred seventy-eight".