64616457 has 16 divisors (see below), whose sum is σ = 87406592. Its totient is φ = 42456960.

The previous prime is 64616443. The next prime is 64616471. The reversal of 64616457 is 75461646.

It is an interprime number because it is at equal distance from previous prime (64616443) and next prime (64616471).

It is not a de Polignac number, because 64616457 - 2⁴ = 64616441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64616417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68493 + ... + 69429.

It is an arithmetic number, because the mean of its divisors is an integer number (5462912).

Almost surely, 2^64616457 is an apocalyptic number.

It is an amenable number.

64616457 is a deficient number, since it is larger than the sum of its proper divisors (22790135).

64616457 is a wasteful number, since it uses less digits than its factorization.

64616457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its digits is 120960, while the sum is 39.

The square root of 64616457 is about 8038.4362285211. The cubic root of 64616457 is about 401.2801838689.

The spelling of 64616457 in words is "sixty-four million, six hundred sixteen thousand, four hundred fifty-seven".