25720550259 has 16 divisors (see below), whose sum is σ = 35544078240. Its totient is φ = 16530531840.

The previous prime is 25720550243. The next prime is 25720550263. The reversal of 25720550259 is 95205502752.

It is not a de Polignac number, because 25720550259 - 2⁴ = 25720550243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25720550259.

It is not an unprimeable number, because it can be changed into a prime (25720550759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1050822 + ... + 1075019.

It is an arithmetic number, because the mean of its divisors is an integer number (2221504890).

Almost surely, 2^25720550259 is an apocalyptic number.

25720550259 is a deficient number, since it is larger than the sum of its proper divisors (9823527981).

25720550259 is a wasteful number, since it uses less digits than its factorization.

25720550259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2125990.

The product of its (nonzero) digits is 315000, while the sum is 42.

The spelling of 25720550259 in words is "twenty-five billion, seven hundred twenty million, five hundred fifty thousand, two hundred fifty-nine".