11491333872 has 80 divisors (see below), whose sum is σ = 31449058560. Its totient is φ = 3603188736.

The previous prime is 11491333849. The next prime is 11491333907. The reversal of 11491333872 is 27833319411.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2706183 + ... + 2710425.

It is an arithmetic number, because the mean of its divisors is an integer number (393113232).

Almost surely, 2^11491333872 is an apocalyptic number.

11491333872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11491333872 is an abundant number, since it is smaller than the sum of its proper divisors (19957724688).

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

11491333872 is a wasteful number, since it uses less digits than its factorization.

11491333872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7590 (or 7584 counting only the distinct ones).

The product of its digits is 108864, while the sum is 42.

It can be divided in two parts, 114913 and 33872, that added together give a triangular number (148785 = T₅₄₅).

The spelling of 11491333872 in words is "eleven billion, four hundred ninety-one million, three hundred thirty-three thousand, eight hundred seventy-two".