25530530052805 has 4 divisors (see below), whose sum is σ = 30636636063372. Its totient is φ = 20424424042240.

The previous prime is 25530530052751. The next prime is 25530530052809. The reversal of 25530530052805 is 50825003503552.

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 18080720092449 + 7449809960356 = 4252143^2 + 2729434^2 .

It is not a de Polignac number, because 25530530052805 - 2²⁹ = 25529993181893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530530052809) 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, 2553053005276 + ... + 2553053005285.

It is an arithmetic number, because the mean of its divisors is an integer number (7659159015843).

Almost surely, 2^{25530530052805} is an apocalyptic number.

It is an amenable number.

25530530052805 is a deficient number, since it is larger than the sum of its proper divisors (5106106010567).

25530530052805 is an equidigital number, since it uses as much as digits as its factorization.

25530530052805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106106010566.

The product of its (nonzero) digits is 900000, while the sum is 43.

The spelling of 25530530052805 in words is "twenty-five trillion, five hundred thirty billion, five hundred thirty million, fifty-two thousand, eight hundred five".