11506561044 has 96 divisors (see below), whose sum is σ = 32644684800. Its totient is φ = 3108994560.

The previous prime is 11506560977. The next prime is 11506561091. The reversal of 11506561044 is 44016560511.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 11506560996 and 11506561014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92304 + ... + 177575.

It is an arithmetic number, because the mean of its divisors is an integer number (340048800).

Almost surely, 2^11506561044 is an apocalyptic number.

It is an amenable number.

11506561044 is an abundant number, since it is smaller than the sum of its proper divisors (21138123756).

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

11506561044 is a wasteful number, since it uses less digits than its factorization.

11506561044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269933 (or 269931 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 11506561044 in words is "eleven billion, five hundred six million, five hundred sixty-one thousand, forty-four".