11515874328 has 80 divisors (see below), whose sum is σ = 36862998480. Its totient is φ = 3290248512.

The previous prime is 11515874311. The next prime is 11515874329. The reversal of 11515874328 is 82347851511.

11515874328 is a `hidden beast` number, since 1 + 1 + 5 + 1 + 587 + 43 + 28 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11515874329) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1264851 + ... + 1273922.

It is an arithmetic number, because the mean of its divisors is an integer number (460787481).

Almost surely, 2^11515874328 is an apocalyptic number.

11515874328 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11515874328 is an abundant number, since it is smaller than the sum of its proper divisors (25347124152).

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

11515874328 is a wasteful number, since it uses less digits than its factorization.

11515874328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538798 (or 2538785 counting only the distinct ones).

The product of its digits is 268800, while the sum is 45.

The spelling of 11515874328 in words is "eleven billion, five hundred fifteen million, eight hundred seventy-four thousand, three hundred twenty-eight".