30851173124449 has 4 divisors (see below), whose sum is σ = 30851965580436. Its totient is φ = 30850380668464.

The previous prime is 30851173124437. The next prime is 30851173124459. The reversal of 30851173124449 is 94442137115803.

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 15247345896225 + 15603827228224 = 3904785^2 + 3950168^2 .

It is a cyclic number.

It is not a de Polignac number, because 30851173124449 - 2³³ = 30842583189857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30851173124396 and 30851173124405.

It is not an unprimeable number, because it can be changed into a prime (30851173124419) 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, 396169594 + ... + 396247459.

It is an arithmetic number, because the mean of its divisors is an integer number (7712991395109).

Almost surely, 2^{30851173124449} is an apocalyptic number.

It is an amenable number.

30851173124449 is a deficient number, since it is larger than the sum of its proper divisors (792455987).

30851173124449 is an equidigital number, since it uses as much as digits as its factorization.

30851173124449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792455986.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 30851173124449 in words is "thirty trillion, eight hundred fifty-one billion, one hundred seventy-three million, one hundred twenty-four thousand, four hundred forty-nine".