31486346657 has 2 divisors, whose sum is σ = 31486346658. Its totient is φ = 31486346656.

The previous prime is 31486346627. The next prime is 31486346677. The reversal of 31486346657 is 75664368413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16750571776 + 14735774881 = 129424^2 + 121391^2 .

It is a cyclic number.

It is not a de Polignac number, because 31486346657 - 2⁸ = 31486346401 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31486346599 and 31486346608.

It is not a weakly prime, because it can be changed into another prime (31486346627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15743173328 + 15743173329.

It is an arithmetic number, because the mean of its divisors is an integer number (15743173329).

Almost surely, 2^31486346657 is an apocalyptic number.

It is an amenable number.

31486346657 is a deficient number, since it is larger than the sum of its proper divisors (1).

31486346657 is an equidigital number, since it uses as much as digits as its factorization.

31486346657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 53.

The spelling of 31486346657 in words is "thirty-one billion, four hundred eighty-six million, three hundred forty-six thousand, six hundred fifty-seven".