31657465849 has 2 divisors, whose sum is σ = 31657465850. Its totient is φ = 31657465848.

The previous prime is 31657465843. The next prime is 31657465859. The reversal of 31657465849 is 94856475613.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30252340624 + 1405125225 = 173932^2 + 37485^2 .

It is a cyclic number.

It is not a de Polignac number, because 31657465849 - 2⁹ = 31657465337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31657465793 and 31657465802.

It is not a weakly prime, because it can be changed into another prime (31657465843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15828732924 + 15828732925.

It is an arithmetic number, because the mean of its divisors is an integer number (15828732925).

Almost surely, 2^31657465849 is an apocalyptic number.

It is an amenable number.

31657465849 is a deficient number, since it is larger than the sum of its proper divisors (1).

31657465849 is an equidigital number, since it uses as much as digits as its factorization.

31657465849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21772800, while the sum is 58.

The spelling of 31657465849 in words is "thirty-one billion, six hundred fifty-seven million, four hundred sixty-five thousand, eight hundred forty-nine".