56668337557648 has 40 divisors (see below), whose sum is σ = 114665115837888. Its totient is φ = 27079415628672.

The previous prime is 56668337557627. The next prime is 56668337557649. The reversal of 56668337557648 is 84675573386665.

It is a super-2 number, since 2×56668337557648² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (56668337557649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64428411 + ... + 65302042.

Almost surely, 2^{56668337557648} is an apocalyptic number.

It is an amenable number.

56668337557648 is an abundant number, since it is smaller than the sum of its proper divisors (57996778280240).

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

56668337557648 is a wasteful number, since it uses less digits than its factorization.

56668337557648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129731671 (or 129731665 counting only the distinct ones).

The product of its digits is 18289152000, while the sum is 79.

The spelling of 56668337557648 in words is "fifty-six trillion, six hundred sixty-eight billion, three hundred thirty-seven million, five hundred fifty-seven thousand, six hundred forty-eight".