11556137712 has 40 divisors (see below), whose sum is σ = 34118121856. Its totient is φ = 3301753536.

The previous prime is 11556137711. The next prime is 11556137717. The reversal of 11556137712 is 21773165511.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11556137711) 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, 17196298 + ... + 17196969.

Almost surely, 2^11556137712 is an apocalyptic number.

11556137712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11556137712 is an abundant number, since it is smaller than the sum of its proper divisors (22561984144).

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

11556137712 is a wasteful number, since it uses less digits than its factorization.

11556137712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34393285 (or 34393279 counting only the distinct ones).

The product of its digits is 44100, while the sum is 39.

The spelling of 11556137712 in words is "eleven billion, five hundred fifty-six million, one hundred thirty-seven thousand, seven hundred twelve".