7912135647 has 48 divisors (see below), whose sum is σ = 12784131360. Its totient is φ = 4861181952.

The previous prime is 7912135639. The next prime is 7912135657. The reversal of 7912135647 is 7465312197.

7912135647 is a `hidden beast` number, since 79 + 1 + 2 + 13 + 564 + 7 = 666.

It is not a de Polignac number, because 7912135647 - 2³ = 7912135639 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7912135607) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 2427643 + ... + 2430899.

It is an arithmetic number, because the mean of its divisors is an integer number (266336070).

Almost surely, 2^7912135647 is an apocalyptic number.

7912135647 is a deficient number, since it is larger than the sum of its proper divisors (4871995713).

7912135647 is a wasteful number, since it uses less digits than its factorization.

7912135647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054 (or 4042 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 7912135647 is about 88950.1863235823. The cubic root of 7912135647 is about 1992.6509997563.

The spelling of 7912135647 in words is "seven billion, nine hundred twelve million, one hundred thirty-five thousand, six hundred forty-seven".