55630665161 has 2 divisors, whose sum is σ = 55630665162. Its totient is φ = 55630665160.

The previous prime is 55630665149. The next prime is 55630665163. The reversal of 55630665161 is 16156603655.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47768473600 + 7862191561 = 218560^2 + 88669^2 .

It is a cyclic number.

It is not a de Polignac number, because 55630665161 - 2²⁶ = 55563556297 is a prime.

Together with 55630665163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55630665163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27815332580 + 27815332581.

It is an arithmetic number, because the mean of its divisors is an integer number (27815332581).

Almost surely, 2^55630665161 is an apocalyptic number.

It is an amenable number.

55630665161 is a deficient number, since it is larger than the sum of its proper divisors (1).

55630665161 is an equidigital number, since it uses as much as digits as its factorization.

55630665161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486000, while the sum is 44.

The spelling of 55630665161 in words is "fifty-five billion, six hundred thirty million, six hundred sixty-five thousand, one hundred sixty-one".