31770738613 has 2 divisors, whose sum is σ = 31770738614. Its totient is φ = 31770738612.

The previous prime is 31770738577. The next prime is 31770738653. The reversal of 31770738613 is 31683707713.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31493116369 + 277622244 = 177463^2 + 16662^2 .

It is a cyclic number.

It is not a de Polignac number, because 31770738613 - 2⁹ = 31770738101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31770738653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15885369306 + 15885369307.

It is an arithmetic number, because the mean of its divisors is an integer number (15885369307).

Almost surely, 2^31770738613 is an apocalyptic number.

It is an amenable number.

31770738613 is a deficient number, since it is larger than the sum of its proper divisors (1).

31770738613 is an equidigital number, since it uses as much as digits as its factorization.

31770738613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 46.

The spelling of 31770738613 in words is "thirty-one billion, seven hundred seventy million, seven hundred thirty-eight thousand, six hundred thirteen".