6361561006564 has 6 divisors (see below), whose sum is σ = 11132731761494. Its totient is φ = 3180780503280.

The previous prime is 6361561006487. The next prime is 6361561006597. The reversal of 6361561006564 is 4656001651636.

It can be written as a sum of positive squares in only one way, i.e., 3949130766564 + 2412430240000 = 1987242^2 + 1553200^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795195125817 + ... + 795195125824.

Almost surely, 2^{6361561006564} is an apocalyptic number.

It is an amenable number.

6361561006564 is a deficient number, since it is larger than the sum of its proper divisors (4771170754930).

6361561006564 is a wasteful number, since it uses less digits than its factorization.

6361561006564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1590390251645 (or 1590390251643 counting only the distinct ones).

The product of its (nonzero) digits is 2332800, while the sum is 49.

The spelling of 6361561006564 in words is "six trillion, three hundred sixty-one billion, five hundred sixty-one million, six thousand, five hundred sixty-four".