25530798913 has 4 divisors (see below), whose sum is σ = 25607931568. Its totient is φ = 25453666260.

The previous prime is 25530798899. The next prime is 25530798949. The reversal of 25530798913 is 31989703552.

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.

It is a cyclic number.

It is not a de Polignac number, because 25530798913 - 2⁹ = 25530798401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25530790913) 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, 38565831 + ... + 38566492.

It is an arithmetic number, because the mean of its divisors is an integer number (6401982892).

Almost surely, 2^25530798913 is an apocalyptic number.

It is an amenable number.

25530798913 is a deficient number, since it is larger than the sum of its proper divisors (77132655).

25530798913 is an equidigital number, since it uses as much as digits as its factorization.

25530798913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77132654.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 25530798913 in words is "twenty-five billion, five hundred thirty million, seven hundred ninety-eight thousand, nine hundred thirteen".