55661812018097 has 2 divisors, whose sum is σ = 55661812018098. Its totient is φ = 55661812018096.

The previous prime is 55661812018037. The next prime is 55661812018157. The reversal of 55661812018097 is 79081021816655.

It is a balanced prime because it is at equal distance from previous prime (55661812018037) and next prime (55661812018157).

It can be written as a sum of positive squares in only one way, i.e., 55619914431376 + 41897586721 = 7457876^2 + 204689^2 .

It is a cyclic number.

It is not a de Polignac number, because 55661812018097 - 2¹⁴ = 55661812001713 is a prime.

It is not a weakly prime, because it can be changed into another prime (55661812018037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27830906009048 + 27830906009049.

It is an arithmetic number, because the mean of its divisors is an integer number (27830906009049).

Almost surely, 2^{55661812018097} is an apocalyptic number.

It is an amenable number.

55661812018097 is a deficient number, since it is larger than the sum of its proper divisors (1).

55661812018097 is an equidigital number, since it uses as much as digits as its factorization.

55661812018097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7257600, while the sum is 59.

The spelling of 55661812018097 in words is "fifty-five trillion, six hundred sixty-one billion, eight hundred twelve million, eighteen thousand, ninety-seven".