157564449 has 36 divisors (see below), whose sum is σ = 280338084. Its totient is φ = 84736512.

The previous prime is 157564417. The next prime is 157564457. The reversal of 157564449 is 944465751.

157564449 is a `hidden beast` number, since 157 + 56 + 4 + 449 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 43758225 + 113806224 = 6615^2 + 10668^2 .

It is not a de Polignac number, because 157564449 - 2⁵ = 157564417 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (157564469) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3012 + ... + 18005.

It is an arithmetic number, because the mean of its divisors is an integer number (7787169).

Almost surely, 2^157564449 is an apocalyptic number.

It is an amenable number.

157564449 is a deficient number, since it is larger than the sum of its proper divisors (122773635).

157564449 is a wasteful number, since it uses less digits than its factorization.

157564449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21054 (or 21044 counting only the distinct ones).

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

The square root of 157564449 is about 12552.4678450096. The cubic root of 157564449 is about 540.1148006952.

The spelling of 157564449 in words is "one hundred fifty-seven million, five hundred sixty-four thousand, four hundred forty-nine".