64676392464 has 40 divisors (see below), whose sum is σ = 175874403040. Its totient is φ = 20424123648.

The previous prime is 64676392463. The next prime is 64676392477. The reversal of 64676392464 is 46429367646.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (64676392463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35457637 + ... + 35459460.

It is an arithmetic number, because the mean of its divisors is an integer number (4396860076).

Almost surely, 2^64676392464 is an apocalyptic number.

It is an amenable number.

64676392464 is an abundant number, since it is smaller than the sum of its proper divisors (111198010576).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64676392464 is a wasteful number, since it uses less digits than its factorization.

64676392464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70917127 (or 70917121 counting only the distinct ones).

The product of its digits is 31352832, while the sum is 57.

The spelling of 64676392464 in words is "sixty-four billion, six hundred seventy-six million, three hundred ninety-two thousand, four hundred sixty-four".