30725163613 has 4 divisors (see below), whose sum is σ = 30728274880. Its totient is φ = 30722052348.

The previous prime is 30725163607. The next prime is 30725163619. The reversal of 30725163613 is 31636152703.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (30725163607) and next prime (30725163619).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30725163613 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 (30725163619) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540773 + ... + 1560586.

It is an arithmetic number, because the mean of its divisors is an integer number (7682068720).

Almost surely, 2^30725163613 is an apocalyptic number.

It is an amenable number.

30725163613 is a deficient number, since it is larger than the sum of its proper divisors (3111267).

30725163613 is an equidigital number, since it uses as much as digits as its factorization.

30725163613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111266.

The product of its (nonzero) digits is 68040, while the sum is 37.

The spelling of 30725163613 in words is "thirty billion, seven hundred twenty-five million, one hundred sixty-three thousand, six hundred thirteen".