31683249645 has 16 divisors (see below), whose sum is σ = 53361263040. Its totient is φ = 16008378624.

The previous prime is 31683249643. The next prime is 31683249671. The reversal of 31683249645 is 54694238613.

It is not a de Polignac number, because 31683249645 - 2¹ = 31683249643 is a prime.

It is a super-3 number, since 3×31683249645³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31683249643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55584364 + ... + 55584933.

It is an arithmetic number, because the mean of its divisors is an integer number (3335078940).

Almost surely, 2^31683249645 is an apocalyptic number.

It is an amenable number.

31683249645 is a deficient number, since it is larger than the sum of its proper divisors (21678013395).

31683249645 is a wasteful number, since it uses less digits than its factorization.

31683249645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111169324.

The product of its digits is 3732480, while the sum is 51.

The spelling of 31683249645 in words is "thirty-one billion, six hundred eighty-three million, two hundred forty-nine thousand, six hundred forty-five".