655611166193 has 2 divisors, whose sum is σ = 655611166194. Its totient is φ = 655611166192.

The previous prime is 655611166183. The next prime is 655611166219. The reversal of 655611166193 is 391661116556.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427058329009 + 228552837184 = 653497^2 + 478072^2 .

It is a cyclic number.

It is not a de Polignac number, because 655611166193 - 2¹² = 655611162097 is a prime.

It is a super-2 number, since 2×655611166193² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (655611166123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327805583096 + 327805583097.

It is an arithmetic number, because the mean of its divisors is an integer number (327805583097).

Almost surely, 2^655611166193 is an apocalyptic number.

It is an amenable number.

655611166193 is a deficient number, since it is larger than the sum of its proper divisors (1).

655611166193 is an equidigital number, since it uses as much as digits as its factorization.

655611166193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 874800, while the sum is 50.

The spelling of 655611166193 in words is "six hundred fifty-five billion, six hundred eleven million, one hundred sixty-six thousand, one hundred ninety-three".