30681579493 has 8 divisors (see below), whose sum is σ = 31231775096. Its totient is φ = 30132907200.

The previous prime is 30681579473. The next prime is 30681579499. The reversal of 30681579493 is 39497518603.

It can be written as a sum of positive squares in 4 ways, for example, as 2438088129 + 28243491364 = 49377^2 + 168058^2 .

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 30681579493 - 2²⁵ = 30648025061 is a prime.

It is a Duffinian number.

It is a congruent 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, 340146 + ... + 420787.

It is an arithmetic number, because the mean of its divisors is an integer number (3903971887).

Almost surely, 2^30681579493 is an apocalyptic number.

It is an amenable number.

30681579493 is a deficient number, since it is larger than the sum of its proper divisors (550195603).

30681579493 is an equidigital number, since it uses as much as digits as its factorization.

30681579493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761655.

The product of its (nonzero) digits is 4898880, while the sum is 55.

The spelling of 30681579493 in words is "thirty billion, six hundred eighty-one million, five hundred seventy-nine thousand, four hundred ninety-three".