55656111561 has 8 divisors (see below), whose sum is σ = 74209238400. Its totient is φ = 37103529552.

The previous prime is 55656111559. The next prime is 55656111571. The reversal of 55656111561 is 16511165655.

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

It is not a de Polignac number, because 55656111561 - 2¹ = 55656111559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55656111541) 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, 339840 + ... + 476238.

It is an arithmetic number, because the mean of its divisors is an integer number (9276154800).

Almost surely, 2^55656111561 is an apocalyptic number.

It is an amenable number.

55656111561 is a deficient number, since it is larger than the sum of its proper divisors (18553126839).

55656111561 is a wasteful number, since it uses less digits than its factorization.

55656111561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272415.

The product of its digits is 135000, while the sum is 42.

The spelling of 55656111561 in words is "fifty-five billion, six hundred fifty-six million, one hundred eleven thousand, five hundred sixty-one".