64625534617 has 32 divisors (see below), whose sum is σ = 75685800960. Its totient is φ = 54042500160.

The previous prime is 64625534599. The next prime is 64625534621. The reversal of 64625534617 is 71643552646.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64625534617 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (64625594617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20960358 + ... + 20963440.

It is an arithmetic number, because the mean of its divisors is an integer number (2365181280).

Almost surely, 2^64625534617 is an apocalyptic number.

It is an amenable number.

64625534617 is a deficient number, since it is larger than the sum of its proper divisors (11060266343).

64625534617 is a wasteful number, since it uses less digits than its factorization.

64625534617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3613.

The product of its digits is 3628800, while the sum is 49.

The spelling of 64625534617 in words is "sixty-four billion, six hundred twenty-five million, five hundred thirty-four thousand, six hundred seventeen".