7956985985 has 32 divisors (see below), whose sum is σ = 10398471552. Its totient is φ = 5810088960.

The previous prime is 7956985979. The next prime is 7956985997. The reversal of 7956985985 is 5895896597.

It is not a de Polignac number, because 7956985985 - 2⁴ = 7956985969 is a prime.

It is a Duffinian number.

It is a Curzon 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, 6794450 + ... + 6795620.

It is an arithmetic number, because the mean of its divisors is an integer number (324952236).

Almost surely, 2^7956985985 is an apocalyptic number.

It is an amenable number.

7956985985 is a deficient number, since it is larger than the sum of its proper divisors (2441485567).

7956985985 is a wasteful number, since it uses less digits than its factorization.

7956985985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2273.

The product of its digits is 244944000, while the sum is 71.

The square root of 7956985985 is about 89201.9393567203. The cubic root of 7956985985 is about 1996.4090551663.

The spelling of 7956985985 in words is "seven billion, nine hundred fifty-six million, nine hundred eighty-five thousand, nine hundred eighty-five".