11556085280816 has 20 divisors (see below), whose sum is σ = 22424203024032. Its totient is φ = 5769194177856.

The previous prime is 11556085280777. The next prime is 11556085280821. The reversal of 11556085280816 is 61808258065511.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

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, 553018136 + ... + 553039031.

Almost surely, 2^{11556085280816} is an apocalyptic number.

11556085280816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11556085280816 is a deficient number, since it is larger than the sum of its proper divisors (10868117743216).

11556085280816 is a wasteful number, since it uses less digits than its factorization.

11556085280816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106057828 (or 1106057822 counting only the distinct ones).

The product of its (nonzero) digits is 4608000, while the sum is 56.

The spelling of 11556085280816 in words is "eleven trillion, five hundred fifty-six billion, eighty-five million, two hundred eighty thousand, eight hundred sixteen".