30975493891 has 32 divisors (see below), whose sum is σ = 33175396800. Its totient is φ = 28868689920.

The previous prime is 30975493859. The next prime is 30975493897. The reversal of 30975493891 is 19839457903.

It is a cyclic number.

It is not a de Polignac number, because 30975493891 - 2⁵ = 30975493859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30975493897) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79628325 + ... + 79628713.

It is an arithmetic number, because the mean of its divisors is an integer number (1036731150).

Almost surely, 2^30975493891 is an apocalyptic number.

30975493891 is a deficient number, since it is larger than the sum of its proper divisors (2199902909).

30975493891 is a wasteful number, since it uses less digits than its factorization.

30975493891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999.

The product of its (nonzero) digits is 7348320, while the sum is 58.

The spelling of 30975493891 in words is "thirty billion, nine hundred seventy-five million, four hundred ninety-three thousand, eight hundred ninety-one".