64887906336 has 96 divisors (see below), whose sum is σ = 187731286848. Its totient is φ = 19460259840.

The previous prime is 64887906331. The next prime is 64887906353. The reversal of 64887906336 is 63360978846.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 64887906336.

It is not an unprimeable number, because it can be changed into a prime (64887906331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214305 + ... + 419168.

It is an arithmetic number, because the mean of its divisors is an integer number (1955534238).

Almost surely, 2^64887906336 is an apocalyptic number.

64887906336 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

64887906336 is an abundant number, since it is smaller than the sum of its proper divisors (122843380512).

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

64887906336 is a wasteful number, since it uses less digits than its factorization.

64887906336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633594 (or 633586 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 60.

The spelling of 64887906336 in words is "sixty-four billion, eight hundred eighty-seven million, nine hundred six thousand, three hundred thirty-six".