6921255592880 has 20 divisors (see below), whose sum is σ = 16091919253632. Its totient is φ = 2768502237120.

The previous prime is 6921255592879. The next prime is 6921255592891. The reversal of 6921255592880 is 882955521296.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-5 number, since 5×6921255592880⁵ (a number of 65 digits) contains 55555 as substring.

It is a hoax number, since the sum of its digits (62) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43257847376 + ... + 43257847535.

Almost surely, 2^{6921255592880} is an apocalyptic number.

It is an amenable number.

6921255592880 is an abundant number, since it is smaller than the sum of its proper divisors (9170663660752).

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

6921255592880 is a wasteful number, since it uses less digits than its factorization.

6921255592880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86515694924 (or 86515694918 counting only the distinct ones).

The product of its (nonzero) digits is 31104000, while the sum is 62.

The spelling of 6921255592880 in words is "six trillion, nine hundred twenty-one billion, two hundred fifty-five million, five hundred ninety-two thousand, eight hundred eighty".