13811912868 has 96 divisors (see below), whose sum is σ = 35670450816. Its totient is φ = 4132703232.

The previous prime is 13811912833. The next prime is 13811912879. The reversal of 13811912868 is 86821911831.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1558546 + ... + 1567382.

It is an arithmetic number, because the mean of its divisors is an integer number (371567196).

Almost surely, 2^13811912868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13811912868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17835225408).

13811912868 is an abundant number, since it is smaller than the sum of its proper divisors (21858537948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13811912868 is a wasteful number, since it uses less digits than its factorization.

13811912868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9133 (or 9131 counting only the distinct ones).

The product of its digits is 165888, while the sum is 48.

The spelling of 13811912868 in words is "thirteen billion, eight hundred eleven million, nine hundred twelve thousand, eight hundred sixty-eight".