11512651720 has 32 divisors (see below), whose sum is σ = 25912998720. Its totient is φ = 4603366080.

The previous prime is 11512651697. The next prime is 11512651729. The reversal of 11512651720 is 2715621511.

It is a super-2 number, since 2×11512651720² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11512651729) 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, 60079 + ... + 163201.

It is an arithmetic number, because the mean of its divisors is an integer number (809781210).

Almost surely, 2^11512651720 is an apocalyptic number.

11512651720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11512651720 is an abundant number, since it is smaller than the sum of its proper divisors (14400347000).

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

11512651720 is a wasteful number, since it uses less digits than its factorization.

11512651720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105925 (or 105921 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 31.

The spelling of 11512651720 in words is "eleven billion, five hundred twelve million, six hundred fifty-one thousand, seven hundred twenty".