30504739561 has 4 divisors (see below), whose sum is σ = 30505511124. Its totient is φ = 30503968000.

The previous prime is 30504739553. The next prime is 30504739583. The reversal of 30504739561 is 16593740503.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7326504025 + 23178235536 = 85595^2 + 152244^2 .

It is a cyclic number.

It is not a de Polignac number, because 30504739561 - 2³ = 30504739553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30504739541) 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, 323080 + ... + 406681.

It is an arithmetic number, because the mean of its divisors is an integer number (7626377781).

Almost surely, 2^30504739561 is an apocalyptic number.

It is an amenable number.

30504739561 is a deficient number, since it is larger than the sum of its proper divisors (771563).

30504739561 is an equidigital number, since it uses as much as digits as its factorization.

30504739561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771562.

The product of its (nonzero) digits is 340200, while the sum is 43.

The spelling of 30504739561 in words is "thirty billion, five hundred four million, seven hundred thirty-nine thousand, five hundred sixty-one".