7904971646 has 64 divisors (see below), whose sum is σ = 14132676096. Its totient is φ = 3268944000.

The previous prime is 7904971619. The next prime is 7904971663. The reversal of 7904971646 is 6461794097.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8174255 + ... + 8175221.

It is an arithmetic number, because the mean of its divisors is an integer number (220823064).

Almost surely, 2^7904971646 is an apocalyptic number.

7904971646 is a deficient number, since it is larger than the sum of its proper divisors (6227704450).

7904971646 is a wasteful number, since it uses less digits than its factorization.

7904971646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1377.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 7904971646 is about 88909.9074681781. The cubic root of 7904971646 is about 1992.0494064118.

The spelling of 7904971646 in words is "seven billion, nine hundred four million, nine hundred seventy-one thousand, six hundred forty-six".