30971761491 has 48 divisors (see below), whose sum is σ = 48108598272. Its totient is φ = 17649181440.

The previous prime is 30971761459. The next prime is 30971761493. The reversal of 30971761491 is 19416717903.

It is not a de Polignac number, because 30971761491 - 2⁵ = 30971761459 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30971761491.

It is not an unprimeable number, because it can be changed into a prime (30971761493) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 8779570 + ... + 8783096.

It is an arithmetic number, because the mean of its divisors is an integer number (1002262464).

Almost surely, 2^30971761491 is an apocalyptic number.

30971761491 is a deficient number, since it is larger than the sum of its proper divisors (17136836781).

30971761491 is a wasteful number, since it uses less digits than its factorization.

30971761491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4992 (or 4981 counting only the distinct ones).

The product of its (nonzero) digits is 285768, while the sum is 48.

The spelling of 30971761491 in words is "thirty billion, nine hundred seventy-one million, seven hundred sixty-one thousand, four hundred ninety-one".