25397595361 has 4 divisors (see below), whose sum is σ = 25404739092. Its totient is φ = 25390451632.

The previous prime is 25397595359. The next prime is 25397595373. The reversal of 25397595361 is 16359579352.

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 8752725136 + 16644870225 = 93556^2 + 129015^2 .

It is a cyclic number.

It is not a de Polignac number, because 25397595361 - 2¹ = 25397595359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25397595331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3566530 + ... + 3573643.

It is an arithmetic number, because the mean of its divisors is an integer number (6351184773).

Almost surely, 2^25397595361 is an apocalyptic number.

It is an amenable number.

25397595361 is a deficient number, since it is larger than the sum of its proper divisors (7143731).

25397595361 is an equidigital number, since it uses as much as digits as its factorization.

25397595361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7143730.

The product of its digits is 7654500, while the sum is 55.

The spelling of 25397595361 in words is "twenty-five billion, three hundred ninety-seven million, five hundred ninety-five thousand, three hundred sixty-one".