64536651 has 6 divisors (see below), whose sum is σ = 93219620. Its totient is φ = 43024428.

The previous prime is 64536623. The next prime is 64536653. The reversal of 64536651 is 15663546.

64536651 is a `hidden beast` number, since 64 + 536 + 65 + 1 = 666.

It is not a de Polignac number, because 64536651 - 2⁷ = 64536523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64536653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3585361 + ... + 3585378.

Almost surely, 2^64536651 is an apocalyptic number.

64536651 is a deficient number, since it is larger than the sum of its proper divisors (28682969).

64536651 is a wasteful number, since it uses less digits than its factorization.

64536651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7170745 (or 7170742 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 64536651 is about 8033.4706696421. The cubic root of 64536651 is about 401.1149124550.

The spelling of 64536651 in words is "sixty-four million, five hundred thirty-six thousand, six hundred fifty-one".