30512864309 has 4 divisors (see below), whose sum is σ = 30597858720. Its totient is φ = 30427869900.

The previous prime is 30512864281. The next prime is 30512864329. The reversal of 30512864309 is 90346821503.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90346821503 = 509 ⋅177498667.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30512864309 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 (30512864329) 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 3 ways as a sum of consecutive naturals, for example, 42496667 + ... + 42497384.

It is an arithmetic number, because the mean of its divisors is an integer number (7649464680).

Almost surely, 2^30512864309 is an apocalyptic number.

It is an amenable number.

30512864309 is a deficient number, since it is larger than the sum of its proper divisors (84994411).

30512864309 is an equidigital number, since it uses as much as digits as its factorization.

30512864309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84994410.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 30512864309 in words is "thirty billion, five hundred twelve million, eight hundred sixty-four thousand, three hundred nine".