64390315560 has 64 divisors (see below), whose sum is σ = 194943196800. Its totient is φ = 17013217536.

The previous prime is 64390315559. The next prime is 64390315567. The reversal of 64390315560 is 6551309346.

It is a super-2 number, since 2×64390315560² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64390315567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2448324 + ... + 2474483.

It is an arithmetic number, because the mean of its divisors is an integer number (3045987450).

Almost surely, 2^64390315560 is an apocalyptic number.

64390315560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64390315560 is an abundant number, since it is smaller than the sum of its proper divisors (130552881240).

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

64390315560 is a wasteful number, since it uses less digits than its factorization.

64390315560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4922930 (or 4922926 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 42.

The spelling of 64390315560 in words is "sixty-four billion, three hundred ninety million, three hundred fifteen thousand, five hundred sixty".