31312350667777 has 2 divisors, whose sum is σ = 31312350667778. Its totient is φ = 31312350667776.

The previous prime is 31312350667751. The next prime is 31312350667789. The reversal of 31312350667777 is 77776605321313.

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., 19618795934721 + 11693554733056 = 4429311^2 + 3419584^2 .

It is a cyclic number.

It is not a de Polignac number, because 31312350667777 - 2⁷ = 31312350667649 is a prime.

It is a super-2 number, since 2×31312350667777² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31312356667777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656175333888 + 15656175333889.

It is an arithmetic number, because the mean of its divisors is an integer number (15656175333889).

Almost surely, 2^{31312350667777} is an apocalyptic number.

It is an amenable number.

31312350667777 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312350667777 is an equidigital number, since it uses as much as digits as its factorization.

31312350667777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23337720, while the sum is 58.

The spelling of 31312350667777 in words is "thirty-one trillion, three hundred twelve billion, three hundred fifty million, six hundred sixty-seven thousand, seven hundred seventy-seven".