11561836120 has 16 divisors (see below), whose sum is σ = 26014131360. Its totient is φ = 4624734432.

The previous prime is 11561836079. The next prime is 11561836133. The reversal of 11561836120 is 2163816511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144522912 + ... + 144522991.

It is an arithmetic number, because the mean of its divisors is an integer number (1625883210).

Almost surely, 2^11561836120 is an apocalyptic number.

11561836120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11561836120 is an abundant number, since it is smaller than the sum of its proper divisors (14452295240).

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

11561836120 is a wasteful number, since it uses less digits than its factorization.

11561836120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289045914 (or 289045910 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The spelling of 11561836120 in words is "eleven billion, five hundred sixty-one million, eight hundred thirty-six thousand, one hundred twenty".