610908641081 has 2 divisors, whose sum is σ = 610908641082. Its totient is φ = 610908641080.

The previous prime is 610908641069. The next prime is 610908641099. The reversal of 610908641081 is 180146809016.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443722515625 + 167186125456 = 666125^2 + 408884^2 .

It is a cyclic number.

It is not a de Polignac number, because 610908641081 - 2⁶ = 610908641017 is a prime.

It is a super-2 number, since 2×610908641081² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (610908641051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305454320540 + 305454320541.

It is an arithmetic number, because the mean of its divisors is an integer number (305454320541).

Almost surely, 2^610908641081 is an apocalyptic number.

It is an amenable number.

610908641081 is a deficient number, since it is larger than the sum of its proper divisors (1).

610908641081 is an equidigital number, since it uses as much as digits as its factorization.

610908641081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 44.

The spelling of 610908641081 in words is "six hundred ten billion, nine hundred eight million, six hundred forty-one thousand, eighty-one".