64400022688 has 24 divisors (see below), whose sum is σ = 126815498208. Its totient is φ = 32192912064.

The previous prime is 64400022671. The next prime is 64400022733. The reversal of 64400022688 is 88622000446.

It is a self number, because there is not a number n which added to its sum of digits gives 64400022688.

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 3 ways as a sum of consecutive naturals, for example, 72906 + ... + 366217.

It is an arithmetic number, because the mean of its divisors is an integer number (5283979092).

Almost surely, 2^64400022688 is an apocalyptic number.

It is an amenable number.

64400022688 is a deficient number, since it is larger than the sum of its proper divisors (62415475520).

64400022688 is a wasteful number, since it uses less digits than its factorization.

64400022688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443716 (or 443708 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 40.

The spelling of 64400022688 in words is "sixty-four billion, four hundred million, twenty-two thousand, six hundred eighty-eight".