11553044405551 has 12 divisors (see below), whose sum is σ = 12735187171000. Its totient is φ = 10472673713040.

The previous prime is 11553044405533. The next prime is 11553044405627. The reversal of 11553044405551 is 15550444035511.

It is not a de Polignac number, because 11553044405551 - 2²⁷ = 11552910187823 is a prime.

It is a super-2 number, since 2×11553044405551² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11553044405498 and 11553044405507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11553044405531) 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, 136748181 + ... + 136832638.

Almost surely, 2^{11553044405551} is an apocalyptic number.

11553044405551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11553044405551 is a deficient number, since it is larger than the sum of its proper divisors (1182142765449).

11553044405551 is a wasteful number, since it uses less digits than its factorization.

11553044405551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273581190 (or 273581179 counting only the distinct ones).

The product of its (nonzero) digits is 600000, while the sum is 43.

The spelling of 11553044405551 in words is "eleven trillion, five hundred fifty-three billion, forty-four million, four hundred five thousand, five hundred fifty-one".