64012126864 has 30 divisors (see below), whose sum is σ = 144272231574. Its totient is φ = 27433768320.

The previous prime is 64012126861. The next prime is 64012126901. The reversal of 64012126864 is 46862121046.

It can be written as a sum of positive squares in only one way, i.e., 62646085264 + 1366041600 = 250292^2 + 36960^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64012126861) 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 5 ways as a sum of consecutive naturals, for example, 40823277 + ... + 40824844.

Almost surely, 2^64012126864 is an apocalyptic number.

It is an amenable number.

64012126864 is an abundant number, since it is smaller than the sum of its proper divisors (80260104710).

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

64012126864 is a wasteful number, since it uses less digits than its factorization.

64012126864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81648143 (or 81648130 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 64012126864 in words is "sixty-four billion, twelve million, one hundred twenty-six thousand, eight hundred sixty-four".