31353028649 has 2 divisors, whose sum is σ = 31353028650. Its totient is φ = 31353028648.

The previous prime is 31353028627. The next prime is 31353028717. The reversal of 31353028649 is 94682035313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30288181225 + 1064847424 = 174035^2 + 32632^2 .

It is a cyclic number.

It is not a de Polignac number, because 31353028649 - 2⁸ = 31353028393 is a prime.

It is not a weakly prime, because it can be changed into another prime (31353028849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15676514324 + 15676514325.

It is an arithmetic number, because the mean of its divisors is an integer number (15676514325).

Almost surely, 2^31353028649 is an apocalyptic number.

It is an amenable number.

31353028649 is a deficient number, since it is larger than the sum of its proper divisors (1).

31353028649 is an equidigital number, since it uses as much as digits as its factorization.

31353028649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 44.

The spelling of 31353028649 in words is "thirty-one billion, three hundred fifty-three million, twenty-eight thousand, six hundred forty-nine".