64915157 has 2 divisors, whose sum is σ = 64915158. Its totient is φ = 64915156.

The previous prime is 64915139. The next prime is 64915159. The reversal of 64915157 is 75151946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50822641 + 14092516 = 7129^2 + 3754^2 .

It is a cyclic number.

It is not a de Polignac number, because 64915157 - 2⁶ = 64915093 is a prime.

Together with 64915159, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3835838 and since 64915157 and 3835838 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64915157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64915159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32457578 + 32457579.

It is an arithmetic number, because the mean of its divisors is an integer number (32457579).

Almost surely, 2^64915157 is an apocalyptic number.

It is an amenable number.

64915157 is a deficient number, since it is larger than the sum of its proper divisors (1).

64915157 is an equidigital number, since it uses as much as digits as its factorization.

64915157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37800, while the sum is 38.

The square root of 64915157 is about 8056.9942906769. The cubic root of 64915157 is about 401.8975610043.

The spelling of 64915157 in words is "sixty-four million, nine hundred fifteen thousand, one hundred fifty-seven".