157685456 has 20 divisors (see below), whose sum is σ = 306029892. Its totient is φ = 78710016.

The previous prime is 157685449. The next prime is 157685459. The reversal of 157685456 is 654586751.

It can be written as a sum of positive squares in 2 ways, for example, as 51265600 + 106419856 = 7160^2 + 10316^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 157685456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157685459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886 + ... + 17858.

Almost surely, 2^157685456 is an apocalyptic number.

157685456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

157685456 is a deficient number, since it is larger than the sum of its proper divisors (148344436).

157685456 is a wasteful number, since it uses less digits than its factorization.

157685456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16598 (or 16592 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 47.

The square root of 157685456 is about 12557.2869681313. The cubic root of 157685456 is about 540.2530318508.

The spelling of 157685456 in words is "one hundred fifty-seven million, six hundred eighty-five thousand, four hundred fifty-six".