25257890859 has 16 divisors (see below), whose sum is σ = 33788067840. Its totient is φ = 16783222400.

The previous prime is 25257890857. The next prime is 25257890869. The reversal of 25257890859 is 95809875252.

It is a cyclic number.

It is not a de Polignac number, because 25257890859 - 2¹ = 25257890857 is a prime.

It is a super-2 number, since 2×25257890859² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25257890857) 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 15 ways as a sum of consecutive naturals, for example, 1636822 + ... + 1652180.

It is an arithmetic number, because the mean of its divisors is an integer number (2111754240).

Almost surely, 2^25257890859 is an apocalyptic number.

25257890859 is a deficient number, since it is larger than the sum of its proper divisors (8530176981).

25257890859 is a wasteful number, since it uses less digits than its factorization.

25257890859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17130.

The product of its (nonzero) digits is 18144000, while the sum is 60.

The spelling of 25257890859 in words is "twenty-five billion, two hundred fifty-seven million, eight hundred ninety thousand, eight hundred fifty-nine".