64157617 has 2 divisors, whose sum is σ = 64157618. Its totient is φ = 64157616.

The previous prime is 64157573. The next prime is 64157633. The reversal of 64157617 is 71675146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56490256 + 7667361 = 7516^2 + 2769^2 .

It is a cyclic number.

It is not a de Polignac number, because 64157617 - 2¹⁵ = 64124849 is a prime.

It is not a weakly prime, because it can be changed into another prime (64157647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32078808 + 32078809.

It is an arithmetic number, because the mean of its divisors is an integer number (32078809).

Almost surely, 2^64157617 is an apocalyptic number.

It is an amenable number.

64157617 is a deficient number, since it is larger than the sum of its proper divisors (1).

64157617 is an equidigital number, since it uses as much as digits as its factorization.

64157617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 64157617 is about 8009.8450047426. The cubic root of 64157617 is about 400.3280995531.

The spelling of 64157617 in words is "sixty-four million, one hundred fifty-seven thousand, six hundred seventeen".