2646686474496 has 81 divisors (see below), whose sum is σ = 7631274745549. Its totient is φ = 882202795008.

The previous prime is 2646686474429. The next prime is 2646686474539. The reversal of 2646686474496 is 6944746866462.

The square root of 2646686474496 is 1626864.

It is a perfect power (a square), and thus also a powerful number.

2646686474496 is a `hidden beast` number, since 2 + 6 + 4 + 6 + 6 + 8 + 64 + 74 + 496 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2001659040000 + 645027434496 = 1414800^2 + 803136^2 .

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 78072526 + ... + 78106418.

Almost surely, 2^{2646686474496} is an apocalyptic number.

2646686474496 is the 1626864-th square number.

It is an amenable number.

2646686474496 is an abundant number, since it is smaller than the sum of its proper divisors (4984588271053).

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

2646686474496 is an frugal number, since it uses more digits than its factorization.

2646686474496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67808 (or 33898 counting only the distinct ones).

The product of its digits is 2006581248, while the sum is 72.

The spelling of 2646686474496 in words is "two trillion, six hundred forty-six billion, six hundred eighty-six million, four hundred seventy-four thousand, four hundred ninety-six".