64624456136 has 8 divisors (see below), whose sum is σ = 121170855270. Its totient is φ = 32312228064.

The previous prime is 64624456121. The next prime is 64624456153. The reversal of 64624456136 is 63165442646.

It can be written as a sum of positive squares in only one way, i.e., 48721732900 + 15902723236 = 220730^2 + 126106^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4039028501 + ... + 4039028516.

Almost surely, 2^64624456136 is an apocalyptic number.

It is an amenable number.

64624456136 is a deficient number, since it is larger than the sum of its proper divisors (56546399134).

64624456136 is a wasteful number, since it uses less digits than its factorization.

64624456136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8078057023 (or 8078057019 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 47.

The spelling of 64624456136 in words is "sixty-four billion, six hundred twenty-four million, four hundred fifty-six thousand, one hundred thirty-six".