9913812915 has 32 divisors (see below), whose sum is σ = 16282570752. Its totient is φ = 5147744000.

The previous prime is 9913812911. The next prime is 9913812917. The reversal of 9913812915 is 5192183199.

It is not a de Polignac number, because 9913812915 - 2² = 9913812911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9913812911) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 285550 + ... + 318380.

It is an arithmetic number, because the mean of its divisors is an integer number (508830336).

Almost surely, 2^9913812915 is an apocalyptic number.

9913812915 is a deficient number, since it is larger than the sum of its proper divisors (6368757837).

9913812915 is a wasteful number, since it uses less digits than its factorization.

9913812915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33371.

The product of its digits is 174960, while the sum is 48.

The square root of 9913812915 is about 99568.1320252620. The cubic root of 9913812915 is about 2148.2273410931.

The spelling of 9913812915 in words is "nine billion, nine hundred thirteen million, eight hundred twelve thousand, nine hundred fifteen".