157564634 has 4 divisors (see below), whose sum is σ = 236346954. Its totient is φ = 78782316.

The previous prime is 157564613. The next prime is 157564639. The reversal of 157564634 is 436465751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 436465751 = 191 ⋅2285161.

It can be written as a sum of positive squares in only one way, i.e., 106399225 + 51165409 = 10315^2 + 7153^2 .

It is a super-2 number, since 2×157564634² = 49653227775107912, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 157564591 and 157564600.

It is not an unprimeable number, because it can be changed into a prime (157564639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39391157 + ... + 39391160.

Almost surely, 2^157564634 is an apocalyptic number.

157564634 is a deficient number, since it is larger than the sum of its proper divisors (78782320).

157564634 is an equidigital number, since it uses as much as digits as its factorization.

157564634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78782319.

The product of its digits is 302400, while the sum is 41.

The square root of 157564634 is about 12552.4752140763. The cubic root of 157564634 is about 540.1150120822.

The spelling of 157564634 in words is "one hundred fifty-seven million, five hundred sixty-four thousand, six hundred thirty-four".