7904947645 has 32 divisors (see below), whose sum is σ = 10966464000. Its totient is φ = 5358203136.

The previous prime is 7904947637. The next prime is 7904947651. The reversal of 7904947645 is 5467494097.

It is a cyclic number.

It is not a de Polignac number, because 7904947645 - 2³ = 7904947637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1089891 + ... + 1097119.

It is an arithmetic number, because the mean of its divisors is an integer number (342702000).

Almost surely, 2^7904947645 is an apocalyptic number.

It is an amenable number.

7904947645 is a deficient number, since it is larger than the sum of its proper divisors (3061516355).

7904947645 is a wasteful number, since it uses less digits than its factorization.

7904947645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7597.

The product of its (nonzero) digits is 7620480, while the sum is 55.

The square root of 7904947645 is about 88909.7724943664. The cubic root of 7904947645 is about 1992.0473903293.

The spelling of 7904947645 in words is "seven billion, nine hundred four million, nine hundred forty-seven thousand, six hundred forty-five".