64813120631360 has 56 divisors (see below), whose sum is σ = 154340043694200. Its totient is φ = 25924609900544.

The previous prime is 64813120631309. The next prime is 64813120631449. The reversal of 64813120631360 is 6313602131846.

It can be written as a sum of positive squares in 4 ways, for example, as 26227754660416 + 38585365970944 = 5121304^2 + 6211712^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10630592 + ... + 15576768.

It is an arithmetic number, because the mean of its divisors is an integer number (2756072208825).

Almost surely, 2^{64813120631360} is an apocalyptic number.

It is an amenable number.

64813120631360 is an abundant number, since it is smaller than the sum of its proper divisors (89526923062840).

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

64813120631360 is a wasteful number, since it uses less digits than its factorization.

64813120631360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4987143 (or 4987133 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 44.

The spelling of 64813120631360 in words is "sixty-four trillion, eight hundred thirteen billion, one hundred twenty million, six hundred thirty-one thousand, three hundred sixty".