7957767979 has 16 divisors (see below), whose sum is σ = 9140806656. Its totient is φ = 6786360000.

The previous prime is 7957767971. The next prime is 7957767991. The reversal of 7957767979 is 9797677597.

It is not a de Polignac number, because 7957767979 - 2³ = 7957767971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7957767971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1474524 + ... + 1479910.

It is an arithmetic number, because the mean of its divisors is an integer number (571300416).

Almost surely, 2^7957767979 is an apocalyptic number.

7957767979 is a deficient number, since it is larger than the sum of its proper divisors (1183038677).

7957767979 is a wasteful number, since it uses less digits than its factorization.

7957767979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6426.

The product of its digits is 367569090, while the sum is 73.

The square root of 7957767979 is about 89206.3225281706. The cubic root of 7957767979 is about 1996.4744538305.

The spelling of 7957767979 in words is "seven billion, nine hundred fifty-seven million, seven hundred sixty-seven thousand, nine hundred seventy-nine".