7920815379 has 16 divisors (see below), whose sum is σ = 10917947040. Its totient is φ = 5104477440.

The previous prime is 7920815377. The next prime is 7920815411. The reversal of 7920815379 is 9735180297.

It is not a de Polignac number, because 7920815379 - 2¹ = 7920815377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7920815377) 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, 281992 + ... + 308805.

It is an arithmetic number, because the mean of its divisors is an integer number (682371690).

Almost surely, 2^7920815379 is an apocalyptic number.

7920815379 is a deficient number, since it is larger than the sum of its proper divisors (2997131661).

7920815379 is a wasteful number, since it uses less digits than its factorization.

7920815379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590950.

The product of its (nonzero) digits is 952560, while the sum is 51.

The square root of 7920815379 is about 88998.9627973270. The cubic root of 7920815379 is about 1993.3793895250.

The spelling of 7920815379 in words is "seven billion, nine hundred twenty million, eight hundred fifteen thousand, three hundred seventy-nine".