64563630164 has 12 divisors (see below), whose sum is σ = 123257839488. Its totient is φ = 29347104600.

The previous prime is 64563630121. The next prime is 64563630169. The reversal of 64563630164 is 46103636546.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 1467355231 = 64563630164 / (6 + 4 + 5 + 6 + 3 + 6 + 3 + 0 + 1 + 6 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64563630169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733677572 + ... + 733677659.

It is an arithmetic number, because the mean of its divisors is an integer number (10271486624).

Almost surely, 2^64563630164 is an apocalyptic number.

It is an amenable number.

64563630164 is a deficient number, since it is larger than the sum of its proper divisors (58694209324).

64563630164 is a wasteful number, since it uses less digits than its factorization.

64563630164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467355246 (or 1467355244 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 44.

The spelling of 64563630164 in words is "sixty-four billion, five hundred sixty-three million, six hundred thirty thousand, one hundred sixty-four".