30825500857 has 4 divisors (see below), whose sum is σ = 30898720996. Its totient is φ = 30752280720.

The previous prime is 30825500837. The next prime is 30825500863. The reversal of 30825500857 is 75800552803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75800552803 = 191 ⋅396861533.

It can be written as a sum of positive squares in 2 ways, for example, as 3923268496 + 26902232361 = 62636^2 + 164019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30825500857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30825500807) 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, 36609438 + ... + 36610279.

It is an arithmetic number, because the mean of its divisors is an integer number (7724680249).

Almost surely, 2^30825500857 is an apocalyptic number.

It is an amenable number.

30825500857 is a deficient number, since it is larger than the sum of its proper divisors (73220139).

30825500857 is an equidigital number, since it uses as much as digits as its factorization.

30825500857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73220138.

The product of its (nonzero) digits is 336000, while the sum is 43.

The spelling of 30825500857 in words is "thirty billion, eight hundred twenty-five million, five hundred thousand, eight hundred fifty-seven".