31376760661 has 2 divisors, whose sum is σ = 31376760662. Its totient is φ = 31376760660.

The previous prime is 31376760659. The next prime is 31376760713. The reversal of 31376760661 is 16606767313.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29650773636 + 1725987025 = 172194^2 + 41545^2 .

It is a cyclic number.

It is not a de Polignac number, because 31376760661 - 2¹ = 31376760659 is a prime.

It is a super-2 number, since 2×31376760661² (a number of 22 digits) contains 22 as substring.

Together with 31376760659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31376760161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15688380330 + 15688380331.

It is an arithmetic number, because the mean of its divisors is an integer number (15688380331).

Almost surely, 2^31376760661 is an apocalyptic number.

It is an amenable number.

31376760661 is a deficient number, since it is larger than the sum of its proper divisors (1).

31376760661 is an equidigital number, since it uses as much as digits as its factorization.

31376760661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 571536, while the sum is 46.

The spelling of 31376760661 in words is "thirty-one billion, three hundred seventy-six million, seven hundred sixty thousand, six hundred sixty-one".