25970289409 has 9 divisors (see below), whose sum is σ = 26901537897. Its totient is φ = 25070249904.

The previous prime is 25970289407. The next prime is 25970289451. The reversal of 25970289409 is 90498207952.

The square root of 25970289409 is 161153.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 7509089025 + 18461200384 = 86655^2 + 135872^2 .

It is not a de Polignac number, because 25970289409 - 2¹ = 25970289407 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25970289409.

It is not an unprimeable number, because it can be changed into a prime (25970289407) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4670659 + ... + 4676215.

Almost surely, 2^25970289409 is an apocalyptic number.

25970289409 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

25970289409 is the 161153-rd square number.

25970289409 is the 80577-th centered octagonal number.

It is an amenable number.

25970289409 is a deficient number, since it is larger than the sum of its proper divisors (931248488).

25970289409 is an frugal number, since it uses more digits than its factorization.

25970289409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11172 (or 5586 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 25970289409 in words is "twenty-five billion, nine hundred seventy million, two hundred eighty-nine thousand, four hundred nine".