7812641979 has 24 divisors (see below), whose sum is σ = 11762097152. Its totient is φ = 4991459760.

The previous prime is 7812641933. The next prime is 7812642017. The reversal of 7812641979 is 9791462187.

It is not a de Polignac number, because 7812641979 - 2¹² = 7812637883 is a prime.

It is a super-2 number, since 2×7812641979² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7812641479) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107197 + ... + 164670.

Almost surely, 2^7812641979 is an apocalyptic number.

7812641979 is a deficient number, since it is larger than the sum of its proper divisors (3949455173).

7812641979 is a wasteful number, since it uses less digits than its factorization.

7812641979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272007 (or 272004 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 7812641979 is about 88389.1507991790. The cubic root of 7812641979 is about 1984.2633350268.

The spelling of 7812641979 in words is "seven billion, eight hundred twelve million, six hundred forty-one thousand, nine hundred seventy-nine".