30861641945 has 4 divisors (see below), whose sum is σ = 37033970340. Its totient is φ = 24689313552.

The previous prime is 30861641933. The next prime is 30861642073. The reversal of 30861641945 is 54914616803.

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 3840528784 + 27021113161 = 61972^2 + 164381^2 .

It is a cyclic number.

It is not a de Polignac number, because 30861641945 - 2²⁰ = 30860593369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30861641945.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3086164190 + ... + 3086164199.

It is an arithmetic number, because the mean of its divisors is an integer number (9258492585).

Almost surely, 2^30861641945 is an apocalyptic number.

It is an amenable number.

30861641945 is a deficient number, since it is larger than the sum of its proper divisors (6172328395).

30861641945 is an equidigital number, since it uses as much as digits as its factorization.

30861641945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172328394.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 30861641945 in words is "thirty billion, eight hundred sixty-one million, six hundred forty-one thousand, nine hundred forty-five".