31607415641 has 2 divisors, whose sum is σ = 31607415642. Its totient is φ = 31607415640.

The previous prime is 31607415577. The next prime is 31607415677. The reversal of 31607415641 is 14651470613.

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., 29654217616 + 1953198025 = 172204^2 + 44195^2 .

It is a cyclic number.

It is not a de Polignac number, because 31607415641 - 2⁶ = 31607415577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31607415595 and 31607415604.

It is not a weakly prime, because it can be changed into another prime (31607415241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15803707820 + 15803707821.

It is an arithmetic number, because the mean of its divisors is an integer number (15803707821).

Almost surely, 2^31607415641 is an apocalyptic number.

It is an amenable number.

31607415641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31607415641 is an equidigital number, since it uses as much as digits as its factorization.

31607415641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 31607415641 in words is "thirty-one billion, six hundred seven million, four hundred fifteen thousand, six hundred forty-one".