64171652625 has 96 divisors (see below), whose sum is σ = 120193557120. Its totient is φ = 34159579200.

The previous prime is 64171652621. The next prime is 64171652639. The reversal of 64171652625 is 52625617146.

64171652625 is a `hidden beast` number, since 6 + 4 + 1 + 7 + 16 + 5 + 2 + 625 = 666.

It is not a de Polignac number, because 64171652625 - 2² = 64171652621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (64171652621) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18800419 + ... + 18803831.

It is an arithmetic number, because the mean of its divisors is an integer number (1252016220).

Almost surely, 2^64171652625 is an apocalyptic number.

It is an amenable number.

64171652625 is a deficient number, since it is larger than the sum of its proper divisors (56021904495).

64171652625 is an equidigital number, since it uses as much as digits as its factorization.

64171652625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062 (or 4040 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 64171652625 in words is "sixty-four billion, one hundred seventy-one million, six hundred fifty-two thousand, six hundred twenty-five".