55561515666013 has 8 divisors (see below), whose sum is σ = 63498925631232. Its totient is φ = 47624118346896.

The previous prime is 55561515666011. The next prime is 55561515666023. The reversal of 55561515666013 is 31066651516555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55561515666013 - 2¹ = 55561515666011 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561515666011) 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, 9790956 + ... + 14387002.

It is an arithmetic number, because the mean of its divisors is an integer number (7937365703904).

Almost surely, 2^{55561515666013} is an apocalyptic number.

It is an amenable number.

55561515666013 is a deficient number, since it is larger than the sum of its proper divisors (7937409965219).

55561515666013 is a wasteful number, since it uses less digits than its factorization.

55561515666013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6323051.

The product of its (nonzero) digits is 12150000, while the sum is 55.

The spelling of 55561515666013 in words is "fifty-five trillion, five hundred sixty-one billion, five hundred fifteen million, six hundred sixty-six thousand, thirteen".