11056561983 has 12 divisors (see below), whose sum is σ = 16910036208. Its totient is φ = 6937450560.

The previous prime is 11056561979. The next prime is 11056562029. The reversal of 11056561983 is 38916565011.

11056561983 is a `hidden beast` number, since 1 + 1 + 0 + 5 + 6 + 561 + 9 + 83 = 666.

It is not a de Polignac number, because 11056561983 - 2² = 11056561979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11056561903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36132403 + ... + 36132708.

It is an arithmetic number, because the mean of its divisors is an integer number (1409169684).

Almost surely, 2^11056561983 is an apocalyptic number.

11056561983 is a deficient number, since it is larger than the sum of its proper divisors (5853474225).

11056561983 is a wasteful number, since it uses less digits than its factorization.

11056561983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72265134 (or 72265131 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 11056561983 in words is "eleven billion, fifty-six million, five hundred sixty-one thousand, nine hundred eighty-three".