610187945681 has 2 divisors, whose sum is σ = 610187945682. Its totient is φ = 610187945680.

The previous prime is 610187945629. The next prime is 610187945693. The reversal of 610187945681 is 186549781016.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424354530625 + 185833415056 = 651425^2 + 431084^2 .

It is a cyclic number.

It is not a de Polignac number, because 610187945681 - 2¹⁰ = 610187944657 is a prime.

It is a super-2 number, since 2×610187945681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (610187945581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305093972840 + 305093972841.

It is an arithmetic number, because the mean of its divisors is an integer number (305093972841).

Almost surely, 2^610187945681 is an apocalyptic number.

It is an amenable number.

610187945681 is a deficient number, since it is larger than the sum of its proper divisors (1).

610187945681 is an equidigital number, since it uses as much as digits as its factorization.

610187945681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2903040, while the sum is 56.

The spelling of 610187945681 in words is "six hundred ten billion, one hundred eighty-seven million, nine hundred forty-five thousand, six hundred eighty-one".