31283360649 has 20 divisors (see below), whose sum is σ = 46905691140. Its totient is φ = 20778029280.

The previous prime is 31283360639. The next prime is 31283360683. The reversal of 31283360649 is 94606338213.

31283360649 is a `hidden beast` number, since 3 + 1 + 2 + 8 + 33 + 606 + 4 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2149991424 + 29133369225 = 46368^2 + 170685^2 .

It is not a de Polignac number, because 31283360649 - 2⁸ = 31283360393 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (31283360629) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 696082 + ... + 739659.

It is an arithmetic number, because the mean of its divisors is an integer number (2345284557).

Almost surely, 2^31283360649 is an apocalyptic number.

It is an amenable number.

31283360649 is a deficient number, since it is larger than the sum of its proper divisors (15622330491).

31283360649 is a wasteful number, since it uses less digits than its factorization.

31283360649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1436022 (or 1436013 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 45.

The spelling of 31283360649 in words is "thirty-one billion, two hundred eighty-three million, three hundred sixty thousand, six hundred forty-nine".