30681579491 has 8 divisors (see below), whose sum is σ = 32018975520. Its totient is φ = 29344468032.

The previous prime is 30681579473. The next prime is 30681579499. The reversal of 30681579491 is 19497518603.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30681579491 - 2⁶ = 30681579427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30681579499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 166055 + ... + 298223.

It is an arithmetic number, because the mean of its divisors is an integer number (4002371940).

Almost surely, 2^30681579491 is an apocalyptic number.

30681579491 is a deficient number, since it is larger than the sum of its proper divisors (1337396029).

30681579491 is a wasteful number, since it uses less digits than its factorization.

30681579491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142285.

The product of its (nonzero) digits is 1632960, while the sum is 53.

The spelling of 30681579491 in words is "thirty billion, six hundred eighty-one million, five hundred seventy-nine thousand, four hundred ninety-one".