11551515656645 has 32 divisors (see below), whose sum is σ = 14089050855936. Its totient is φ = 9090948832000.

The previous prime is 11551515656633. The next prime is 11551515656647. The reversal of 11551515656645 is 54665651515511.

It is not a de Polignac number, because 11551515656645 - 2¹⁴ = 11551515640261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11551515656647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200772872 + ... + 200830398.

It is an arithmetic number, because the mean of its divisors is an integer number (440282839248).

Almost surely, 2^{11551515656645} is an apocalyptic number.

It is an amenable number.

11551515656645 is a deficient number, since it is larger than the sum of its proper divisors (2537535199291).

11551515656645 is a wasteful number, since it uses less digits than its factorization.

11551515656645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60181.

The product of its digits is 13500000, while the sum is 56.

The spelling of 11551515656645 in words is "eleven trillion, five hundred fifty-one billion, five hundred fifteen million, six hundred fifty-six thousand, six hundred forty-five".