6409139604 has 48 divisors (see below), whose sum is σ = 18096398208. Its totient is φ = 1723465728.

The previous prime is 6409139599. The next prime is 6409139647. The reversal of 6409139604 is 4069319046.

It is a super-2 number, since 2×6409139604² = 82154140927122553632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2242669 + ... + 2245524.

It is an arithmetic number, because the mean of its divisors is an integer number (377008296).

Almost surely, 2^6409139604 is an apocalyptic number.

It is an amenable number.

6409139604 is an abundant number, since it is smaller than the sum of its proper divisors (11687258604).

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

6409139604 is a wasteful number, since it uses less digits than its factorization.

6409139604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4488224 (or 4488222 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 6409139604 is about 80057.1021459058. The cubic root of 6409139604 is about 1857.5189106530.

The spelling of 6409139604 in words is "six billion, four hundred nine million, one hundred thirty-nine thousand, six hundred four".