6421375804756 has 24 divisors (see below), whose sum is σ = 12490291878624. Its totient is φ = 2863735349280.

The previous prime is 6421375804751. The next prime is 6421375804757. The reversal of 6421375804756 is 6574085731246.

It is a self number, because there is not a number n which added to its sum of digits gives 6421375804756.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6421375804751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1376793510 + ... + 1376798173.

It is an arithmetic number, because the mean of its divisors is an integer number (520428828276).

Almost surely, 2^{6421375804756} is an apocalyptic number.

It is an amenable number.

6421375804756 is a deficient number, since it is larger than the sum of its proper divisors (6068916073868).

6421375804756 is a wasteful number, since it uses less digits than its factorization.

6421375804756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2753591751 (or 2753591749 counting only the distinct ones).

The product of its (nonzero) digits is 33868800, while the sum is 58.

The spelling of 6421375804756 in words is "six trillion, four hundred twenty-one billion, three hundred seventy-five million, eight hundred four thousand, seven hundred fifty-six".