25720563371 has 4 divisors (see below), whose sum is σ = 25768106544. Its totient is φ = 25673020200.

The previous prime is 25720563353. The next prime is 25720563373. The reversal of 25720563371 is 17336502752.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25720563371 - 2¹⁸ = 25720301227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25720563373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23770775 + ... + 23771856.

It is an arithmetic number, because the mean of its divisors is an integer number (6442026636).

Almost surely, 2^25720563371 is an apocalyptic number.

25720563371 is a deficient number, since it is larger than the sum of its proper divisors (47543173).

25720563371 is an equidigital number, since it uses as much as digits as its factorization.

25720563371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47543172.

The product of its (nonzero) digits is 264600, while the sum is 41.

The spelling of 25720563371 in words is "twenty-five billion, seven hundred twenty million, five hundred sixty-three thousand, three hundred seventy-one".