7918256685 has 64 divisors (see below), whose sum is σ = 13874872320. Its totient is φ = 3838755840.

The previous prime is 7918256641. The next prime is 7918256771. The reversal of 7918256685 is 5866528197.

It is not a de Polignac number, because 7918256685 - 2¹⁰ = 7918255661 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7770106 + ... + 7771124.

It is an arithmetic number, because the mean of its divisors is an integer number (216794880).

Almost surely, 2^7918256685 is an apocalyptic number.

It is an amenable number.

7918256685 is a deficient number, since it is larger than the sum of its proper divisors (5956615635).

7918256685 is a wasteful number, since it uses less digits than its factorization.

7918256685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2058.

The product of its digits is 7257600, while the sum is 57.

The square root of 7918256685 is about 88984.5867833301. The cubic root of 7918256685 is about 1993.1647231914.

The spelling of 7918256685 in words is "seven billion, nine hundred eighteen million, two hundred fifty-six thousand, six hundred eighty-five".