11172380556 has 24 divisors (see below), whose sum is σ = 26228824384. Its totient is φ = 3701278800.

The previous prime is 11172380543. The next prime is 11172380591. The reversal of 11172380556 is 65508327111.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2853970 + ... + 2857881.

Almost surely, 2^11172380556 is an apocalyptic number.

It is an amenable number.

11172380556 is an abundant number, since it is smaller than the sum of its proper divisors (15056443828).

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

11172380556 is a wasteful number, since it uses less digits than its factorization.

11172380556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5712021 (or 5712019 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The spelling of 11172380556 in words is "eleven billion, one hundred seventy-two million, three hundred eighty thousand, five hundred fifty-six".