64636056506475 has 18 divisors (see below), whose sum is σ = 115770358987556. Its totient is φ = 34472563470000.

The previous prime is 64636056506453. The next prime is 64636056506591. The reversal of 64636056506475 is 57460565063646.

64636056506475 is a `hidden beast` number, since 6 + 4 + 6 + 3 + 6 + 0 + 56 + 506 + 4 + 75 = 666.

It is not a de Polignac number, because 64636056506475 - 2⁷ = 64636056506347 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 143635680901 + ... + 143635681350.

Almost surely, 2^{64636056506475} is an apocalyptic number.

64636056506475 is a deficient number, since it is larger than the sum of its proper divisors (51134302481081).

64636056506475 is a wasteful number, since it uses less digits than its factorization.

64636056506475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287271362267 (or 287271362259 counting only the distinct ones).

The product of its (nonzero) digits is 326592000, while the sum is 63.

The spelling of 64636056506475 in words is "sixty-four trillion, six hundred thirty-six billion, fifty-six million, five hundred six thousand, four hundred seventy-five".