7645120979 has 4 divisors (see below), whose sum is σ = 7645421784. Its totient is φ = 7644820176.

The previous prime is 7645120943. The next prime is 7645120993. The reversal of 7645120979 is 9790215467.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7645120979 - 2³² = 3350153683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7645120279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108362 + ... + 164415.

It is an arithmetic number, because the mean of its divisors is an integer number (1911355446).

Almost surely, 2^7645120979 is an apocalyptic number.

7645120979 is a deficient number, since it is larger than the sum of its proper divisors (300805).

7645120979 is a wasteful number, since it uses less digits than its factorization.

7645120979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300804.

The product of its (nonzero) digits is 952560, while the sum is 50.

The square root of 7645120979 is about 87436.3824674832. The cubic root of 7645120979 is about 1969.9783534945.

The spelling of 7645120979 in words is "seven billion, six hundred forty-five million, one hundred twenty thousand, nine hundred seventy-nine".