31610645057 has 2 divisors, whose sum is σ = 31610645058. Its totient is φ = 31610645056.

The previous prime is 31610645029. The next prime is 31610645081. The reversal of 31610645057 is 75054601613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27464444176 + 4146200881 = 165724^2 + 64391^2 .

It is an emirp because it is prime and its reverse (75054601613) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31610645057 - 2⁶ = 31610644993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31610645057.

It is not a weakly prime, because it can be changed into another prime (31610045057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15805322528 + 15805322529.

It is an arithmetic number, because the mean of its divisors is an integer number (15805322529).

Almost surely, 2^31610645057 is an apocalyptic number.

It is an amenable number.

31610645057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31610645057 is an equidigital number, since it uses as much as digits as its factorization.

31610645057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

It can be divided in two parts, 316106 and 45057, that added together give a palindrome (361163).

The spelling of 31610645057 in words is "thirty-one billion, six hundred ten million, six hundred forty-five thousand, fifty-seven".