6381979482564 has 81 divisors (see below), whose sum is σ = 18766370714637. Its totient is φ = 1823392394208.

The previous prime is 6381979482533. The next prime is 6381979482577. The reversal of 6381979482564 is 4652849791836.

The square root of 6381979482564 is 2526258.

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

6381979482564 is a `hidden beast` number, since 6 + 3 + 8 + 1 + 97 + 9 + 482 + 56 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1840477516164 + 4541501966400 = 1356642^2 + 2131080^2 .

It is a super-2 number, since 2×6381979482564² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6381979482492 and 6381979482501.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 106072762 + ... + 106132910.

Almost surely, 2^{6381979482564} is an apocalyptic number.

6381979482564 is the 2526258-th square number.

It is an amenable number.

6381979482564 is an abundant number, since it is smaller than the sum of its proper divisors (12384391232073).

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

6381979482564 is an frugal number, since it uses more digits than its factorization.

6381979482564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120322 (or 60161 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 72.

The spelling of 6381979482564 in words is "six trillion, three hundred eighty-one billion, nine hundred seventy-nine million, four hundred eighty-two thousand, five hundred sixty-four".