11551112544 has 48 divisors (see below), whose sum is σ = 30966824448. Its totient is φ = 3768446592.

The previous prime is 11551112543. The next prime is 11551112549. The reversal of 11551112544 is 44521115511.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551112543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1275532 + ... + 1284555.

It is an arithmetic number, because the mean of its divisors is an integer number (645142176).

Almost surely, 2^11551112544 is an apocalyptic number.

It is an amenable number.

11551112544 is an abundant number, since it is smaller than the sum of its proper divisors (19415711904).

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

11551112544 is a wasteful number, since it uses less digits than its factorization.

11551112544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2560147 (or 2560139 counting only the distinct ones).

The product of its digits is 4000, while the sum is 30.

The spelling of 11551112544 in words is "eleven billion, five hundred fifty-one million, one hundred twelve thousand, five hundred forty-four".