64800315636 has 48 divisors (see below), whose sum is σ = 173175784320. Its totient is φ = 18474203520.

The previous prime is 64800315617. The next prime is 64800315637. The reversal of 64800315636 is 63651300846.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64800315637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797971 + ... + 875418.

It is an arithmetic number, because the mean of its divisors is an integer number (3607828840).

Almost surely, 2^64800315636 is an apocalyptic number.

It is an amenable number.

64800315636 is an abundant number, since it is smaller than the sum of its proper divisors (108375468684).

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

64800315636 is a wasteful number, since it uses less digits than its factorization.

64800315636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1673864 (or 1673862 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 64800315636 in words is "sixty-four billion, eight hundred million, three hundred fifteen thousand, six hundred thirty-six".