7912912885 has 16 divisors (see below), whose sum is σ = 9827017200. Its totient is φ = 6109497856.

The previous prime is 7912912849. The next prime is 7912912937. The reversal of 7912912885 is 5882192197.

It can be written as a sum of positive squares in 8 ways, for example, as 1471566321 + 6441346564 = 38361^2 + 80258^2 .

It is a cyclic number.

It is not a de Polignac number, because 7912912885 - 2⁹ = 7912912373 is a prime.

It is a super-2 number, since 2×7912912885² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 385707 + ... + 405703.

It is an arithmetic number, because the mean of its divisors is an integer number (614188575).

Almost surely, 2^7912912885 is an apocalyptic number.

It is an amenable number.

7912912885 is a deficient number, since it is larger than the sum of its proper divisors (1914104315).

7912912885 is a wasteful number, since it uses less digits than its factorization.

7912912885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22760.

The product of its digits is 725760, while the sum is 52.

The square root of 7912912885 is about 88954.5551672313. Note that the first 3 decimals coincide. The cubic root of 7912912885 is about 1992.7162460832.

The spelling of 7912912885 in words is "seven billion, nine hundred twelve million, nine hundred twelve thousand, eight hundred eighty-five".