10556555720 has 16 divisors (see below), whose sum is σ = 23752250460. Its totient is φ = 4222622272.

The previous prime is 10556555717. The next prime is 10556555747. The reversal of 10556555720 is 2755565501.

It can be written as a sum of positive squares in 2 ways, for example, as 10136059684 + 420496036 = 100678^2 + 20506^2 .

It is a super-2 number, since 2×10556555720² (a number of 21 digits) contains 22 as substring.

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, 131956907 + ... + 131956986.

Almost surely, 2^10556555720 is an apocalyptic number.

10556555720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10556555720 is an abundant number, since it is smaller than the sum of its proper divisors (13195694740).

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

10556555720 is a wasteful number, since it uses less digits than its factorization.

10556555720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263913904 (or 263913900 counting only the distinct ones).

The product of its (nonzero) digits is 262500, while the sum is 41.

The spelling of 10556555720 in words is "ten billion, five hundred fifty-six million, five hundred fifty-five thousand, seven hundred twenty".