564157494 has 16 divisors (see below), whose sum is σ = 1253683440. Its totient is φ = 188052480.

The previous prime is 564157459. The next prime is 564157543. The reversal of 564157494 is 494751465.

564157494 is a `hidden beast` number, since 5 + 6 + 4 + 157 + 494 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5223627 + ... + 5223734.

It is an arithmetic number, because the mean of its divisors is an integer number (78355215).

Almost surely, 2^564157494 is an apocalyptic number.

564157494 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

564157494 is an abundant number, since it is smaller than the sum of its proper divisors (689525946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

564157494 is a wasteful number, since it uses less digits than its factorization.

564157494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10447372 (or 10447366 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The square root of 564157494 is about 23751.9997894914. Note that the first 3 decimals coincide. The cubic root of 564157494 is about 826.2918207833.

The spelling of 564157494 in words is "five hundred sixty-four million, one hundred fifty-seven thousand, four hundred ninety-four".