610159565681 has 2 divisors, whose sum is σ = 610159565682. Its totient is φ = 610159565680.

The previous prime is 610159565651. The next prime is 610159565699. The reversal of 610159565681 is 186565951016.

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., 609625216225 + 534349456 = 780785^2 + 23116^2 .

It is a cyclic number.

It is not a de Polignac number, because 610159565681 - 2²² = 610155371377 is a prime.

It is a super-2 number, since 2×610159565681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (610159565651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305079782840 + 305079782841.

It is an arithmetic number, because the mean of its divisors is an integer number (305079782841).

Almost surely, 2^610159565681 is an apocalyptic number.

It is an amenable number.

610159565681 is a deficient number, since it is larger than the sum of its proper divisors (1).

610159565681 is an equidigital number, since it uses as much as digits as its factorization.

610159565681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 53.

The spelling of 610159565681 in words is "six hundred ten billion, one hundred fifty-nine million, five hundred sixty-five thousand, six hundred eighty-one".