11881403968 has 42 divisors (see below), whose sum is σ = 27426500646. Its totient is φ = 5092028928.

The previous prime is 11881403959. The next prime is 11881403993. The reversal of 11881403968 is 86930418811.

It can be written as a sum of positive squares in only one way, i.e., 10126799424 + 1754604544 = 100632^2 + 41888^2 .

It is a super-2 number, since 2×11881403968² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1891221 + ... + 1897492.

Almost surely, 2^11881403968 is an apocalyptic number.

It is an amenable number.

11881403968 is an abundant number, since it is smaller than the sum of its proper divisors (15545096678).

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

11881403968 is an equidigital number, since it uses as much as digits as its factorization.

11881403968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3788739 (or 3788722 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 49.

The spelling of 11881403968 in words is "eleven billion, eight hundred eighty-one million, four hundred three thousand, nine hundred sixty-eight".