30631681845 has 16 divisors (see below), whose sum is σ = 54456323520. Its totient is φ = 16336896912.

The previous prime is 30631681837. The next prime is 30631681909. The reversal of 30631681845 is 54818613603.

30631681845 is a `hidden beast` number, since 3 + 0 + 631 + 6 + 8 + 1 + 8 + 4 + 5 = 666.

It is not a de Polignac number, because 30631681845 - 2³ = 30631681837 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 30631681845.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113450539 + ... + 113450808.

It is an arithmetic number, because the mean of its divisors is an integer number (3403520220).

Almost surely, 2^30631681845 is an apocalyptic number.

It is an amenable number.

30631681845 is a deficient number, since it is larger than the sum of its proper divisors (23824641675).

30631681845 is a wasteful number, since it uses less digits than its factorization.

30631681845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226901361 (or 226901355 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The spelling of 30631681845 in words is "thirty billion, six hundred thirty-one million, six hundred eighty-one thousand, eight hundred forty-five".