64637827408 has 40 divisors (see below), whose sum is σ = 156138131520. Its totient is φ = 25183568640.

The previous prime is 64637827379. The next prime is 64637827447. The reversal of 64637827408 is 80472873646.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 26231653 + ... + 26234116.

It is an arithmetic number, because the mean of its divisors is an integer number (3903453288).

Almost surely, 2^64637827408 is an apocalyptic number.

It is an amenable number.

64637827408 is an abundant number, since it is smaller than the sum of its proper divisors (91500304112).

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

64637827408 is a wasteful number, since it uses less digits than its factorization.

64637827408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52465795 (or 52465789 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 55.

The spelling of 64637827408 in words is "sixty-four billion, six hundred thirty-seven million, eight hundred twenty-seven thousand, four hundred eight".