11537712720 has 120 divisors (see below), whose sum is σ = 38770947072. Its totient is φ = 3074860800.

The previous prime is 11537712673. The next prime is 11537712731. The reversal of 11537712720 is 2721773511.

It is a happy number.

11537712720 is a `hidden beast` number, since 1 + 15 + 377 + 1 + 272 + 0 = 666.

11537712720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1516125 + ... + 1523715.

Almost surely, 2^11537712720 is an apocalyptic number.

11537712720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11537712720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19385473536).

11537712720 is an abundant number, since it is smaller than the sum of its proper divisors (27233234352).

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

11537712720 is a wasteful number, since it uses less digits than its factorization.

11537712720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9721 (or 9712 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 36.

The spelling of 11537712720 in words is "eleven billion, five hundred thirty-seven million, seven hundred twelve thousand, seven hundred twenty".