11100561056 has 48 divisors (see below), whose sum is σ = 23619328488. Its totient is φ = 5105049600.

The previous prime is 11100561037. The next prime is 11100561061. The reversal of 11100561056 is 65016500111.

It can be written as a sum of positive squares in 4 ways, for example, as 10427677456 + 672883600 = 102116^2 + 25940^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

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, 69416 + ... + 164376.

Almost surely, 2^11100561056 is an apocalyptic number.

11100561056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11100561056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11809664244).

11100561056 is an abundant number, since it is smaller than the sum of its proper divisors (12518767432).

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

11100561056 is a wasteful number, since it uses less digits than its factorization.

11100561056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95265 (or 95257 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 26.

The spelling of 11100561056 in words is "eleven billion, one hundred million, five hundred sixty-one thousand, fifty-six".