15911134068 has 12 divisors (see below), whose sum is σ = 37125979520. Its totient is φ = 5303711352.

The previous prime is 15911134061. The next prime is 15911134069. The reversal of 15911134068 is 86043111951.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15911134061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 662963908 + ... + 662963931.

Almost surely, 2^15911134068 is an apocalyptic number.

It is an amenable number.

15911134068 is an abundant number, since it is smaller than the sum of its proper divisors (21214845452).

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

15911134068 is a wasteful number, since it uses less digits than its factorization.

15911134068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325927846 (or 1325927844 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 39.

The spelling of 15911134068 in words is "fifteen billion, nine hundred eleven million, one hundred thirty-four thousand, sixty-eight".