6404607764831 has 4 divisors (see below), whose sum is σ = 6404623685832. Its totient is φ = 6404591843832.

The previous prime is 6404607764707. The next prime is 6404607764861. The reversal of 6404607764831 is 1384677064046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6404607764831 - 2²⁶ = 6404540655967 is a prime.

It is a super-2 number, since 2×6404607764831² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6404607764861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7341020 + ... + 8166993.

It is an arithmetic number, because the mean of its divisors is an integer number (1601155921458).

Almost surely, 2^{6404607764831} is an apocalyptic number.

6404607764831 is a deficient number, since it is larger than the sum of its proper divisors (15921001).

6404607764831 is a wasteful number, since it uses less digits than its factorization.

6404607764831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15921000.

The product of its (nonzero) digits is 16257024, while the sum is 56.

The spelling of 6404607764831 in words is "six trillion, four hundred four billion, six hundred seven million, seven hundred sixty-four thousand, eight hundred thirty-one".