11555542080 has 112 divisors (see below), whose sum is σ = 40765415040. Its totient is φ = 3081475584.

The previous prime is 11555542069. The next prime is 11555542099. The reversal of 11555542080 is 8024555511.

11555542080 is a `hidden beast` number, since 1 + 1 + 5 + 5 + 554 + 20 + 80 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 660084 + ... + 677363.

It is an arithmetic number, because the mean of its divisors is an integer number (363976920).

Almost surely, 2^11555542080 is an apocalyptic number.

11555542080 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11555542080 is an abundant number, since it is smaller than the sum of its proper divisors (29209872960).

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

11555542080 is a wasteful number, since it uses less digits than its factorization.

11555542080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337473 (or 1337457 counting only the distinct ones).

The product of its (nonzero) digits is 40000, while the sum is 36.

The spelling of 11555542080 in words is "eleven billion, five hundred fifty-five million, five hundred forty-two thousand, eighty".