55663613161 has 4 divisors (see below), whose sum is σ = 59945429572. Its totient is φ = 51381796752.

The previous prime is 55663613147. The next prime is 55663613227. The reversal of 55663613161 is 16131636655.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8164026025 + 47499587136 = 90355^2 + 217944^2 .

It is not a de Polignac number, because 55663613161 - 2⁵ = 55663613129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55663613101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2140908186 + ... + 2140908211.

It is an arithmetic number, because the mean of its divisors is an integer number (14986357393).

Almost surely, 2^55663613161 is an apocalyptic number.

It is an amenable number.

55663613161 is a deficient number, since it is larger than the sum of its proper divisors (4281816411).

55663613161 is a wasteful number, since it uses less digits than its factorization.

55663613161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281816410.

The product of its digits is 291600, while the sum is 43.

The spelling of 55663613161 in words is "fifty-five billion, six hundred sixty-three million, six hundred thirteen thousand, one hundred sixty-one".