64860990579 has 96 divisors (see below), whose sum is σ = 124309126656. Its totient is φ = 31549916160.

The previous prime is 64860990559. The next prime is 64860990611. The reversal of 64860990579 is 97509906846.

It is a happy number.

It is not a de Polignac number, because 64860990579 - 2⁷ = 64860990451 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (64860990559) 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, 2306884 + ... + 2334830.

It is an arithmetic number, because the mean of its divisors is an integer number (1294886736).

Almost surely, 2^64860990579 is an apocalyptic number.

64860990579 is a deficient number, since it is larger than the sum of its proper divisors (59448136077).

64860990579 is a wasteful number, since it uses less digits than its factorization.

64860990579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28185 (or 28182 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 63.

The spelling of 64860990579 in words is "sixty-four billion, eight hundred sixty million, nine hundred ninety thousand, five hundred seventy-nine".