64707671625 has 64 divisors (see below), whose sum is σ = 114108134400. Its totient is φ = 32451993600.

The previous prime is 64707671603. The next prime is 64707671641. The reversal of 64707671625 is 52617670746.

It is a happy number.

It is not a de Polignac number, because 64707671625 - 2²⁰ = 64706623049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8455801 + ... + 8463449.

It is an arithmetic number, because the mean of its divisors is an integer number (1782939600).

Almost surely, 2^64707671625 is an apocalyptic number.

It is an amenable number.

64707671625 is a deficient number, since it is larger than the sum of its proper divisors (49400462775).

64707671625 is a wasteful number, since it uses less digits than its factorization.

64707671625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9011 (or 9001 counting only the distinct ones).

The product of its (nonzero) digits is 2963520, while the sum is 51.

The spelling of 64707671625 in words is "sixty-four billion, seven hundred seven million, six hundred seventy-one thousand, six hundred twenty-five".