6561190933802 has 16 divisors (see below), whose sum is σ = 9873511050312. Its totient is φ = 3270021181440.

The previous prime is 6561190933777. The next prime is 6561190933813. The reversal of 6561190933802 is 2083390911656.

It can be written as a sum of positive squares in 4 ways, for example, as 2554303971961 + 4006886961841 = 1598219^2 + 2001721^2 .

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, 25309802 + ... + 25567722.

Almost surely, 2^{6561190933802} is an apocalyptic number.

6561190933802 is a deficient number, since it is larger than the sum of its proper divisors (3312320116510).

6561190933802 is a wasteful number, since it uses less digits than its factorization.

6561190933802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298873.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 6561190933802 in words is "six trillion, five hundred sixty-one billion, one hundred ninety million, nine hundred thirty-three thousand, eight hundred two".