7979681955 has 16 divisors (see below), whose sum is σ = 14591418624. Its totient is φ = 3647854560.

The previous prime is 7979681951. The next prime is 7979681971. The reversal of 7979681955 is 5591869797.

It is not a de Polignac number, because 7979681955 - 2² = 7979681951 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7979681951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37998381 + ... + 37998590.

It is an arithmetic number, because the mean of its divisors is an integer number (911963664).

Almost surely, 2^7979681955 is an apocalyptic number.

7979681955 is a deficient number, since it is larger than the sum of its proper divisors (6611736669).

7979681955 is a wasteful number, since it uses less digits than its factorization.

7979681955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75996986.

The product of its digits is 42865200, while the sum is 66.

The square root of 7979681955 is about 89329.0655665892. The cubic root of 7979681955 is about 1998.3053941444.

The spelling of 7979681955 in words is "seven billion, nine hundred seventy-nine million, six hundred eighty-one thousand, nine hundred fifty-five".