6447513902564 has 24 divisors (see below), whose sum is σ = 12895088891328. Its totient is φ = 2763207154080.

The previous prime is 6447513902549. The next prime is 6447513902623. The reversal of 6447513902564 is 4652093157446.

It is a super-2 number, since 2×6447513902564² (a number of 26 digits) contains 22 as substring.

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, 7610462 + ... + 8415114.

It is an arithmetic number, because the mean of its divisors is an integer number (537295370472).

Almost surely, 2^{6447513902564} is an apocalyptic number.

It is an amenable number.

6447513902564 is an abundant number, since it is smaller than the sum of its proper divisors (6447574988764).

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

6447513902564 is a wasteful number, since it uses less digits than its factorization.

6447513902564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1090835 (or 1090833 counting only the distinct ones).

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 6447513902564 in words is "six trillion, four hundred forty-seven billion, five hundred thirteen million, nine hundred two thousand, five hundred sixty-four".