31692346561 has 2 divisors, whose sum is σ = 31692346562. Its totient is φ = 31692346560.

The previous prime is 31692346549. The next prime is 31692346571. The reversal of 31692346561 is 16564329613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30986912961 + 705433600 = 176031^2 + 26560^2 .

It is a cyclic number.

It is not a de Polignac number, because 31692346561 - 2¹¹ = 31692344513 is a prime.

It is not a weakly prime, because it can be changed into another prime (31692346571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15846173280 + 15846173281.

It is an arithmetic number, because the mean of its divisors is an integer number (15846173281).

Almost surely, 2^31692346561 is an apocalyptic number.

It is an amenable number.

31692346561 is a deficient number, since it is larger than the sum of its proper divisors (1).

31692346561 is an equidigital number, since it uses as much as digits as its factorization.

31692346561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 46.

The spelling of 31692346561 in words is "thirty-one billion, six hundred ninety-two million, three hundred forty-six thousand, five hundred sixty-one".