11916064720 has 40 divisors (see below), whose sum is σ = 31662687744. Its totient is φ = 4085507712.

The previous prime is 11916064709. The next prime is 11916064723. The reversal of 11916064720 is 2746061911.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×11916064720² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11916064720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11916064723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10638784 + ... + 10639903.

Almost surely, 2^11916064720 is an apocalyptic number.

11916064720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11916064720 is an abundant number, since it is smaller than the sum of its proper divisors (19746623024).

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

11916064720 is a wasteful number, since it uses less digits than its factorization.

11916064720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21278707 (or 21278701 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The spelling of 11916064720 in words is "eleven billion, nine hundred sixteen million, sixty-four thousand, seven hundred twenty".