25493630597 has 4 divisors (see below), whose sum is σ = 25497659916. Its totient is φ = 25489601280.

The previous prime is 25493630567. The next prime is 25493630599. The reversal of 25493630597 is 79503639452.

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 8537944801 + 16955685796 = 92401^2 + 130214^2 .

It is a cyclic number.

It is not a de Polignac number, because 25493630597 - 2¹⁴ = 25493614213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25493630599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2005154 + ... + 2017827.

It is an arithmetic number, because the mean of its divisors is an integer number (6374414979).

Almost surely, 2^25493630597 is an apocalyptic number.

It is an amenable number.

25493630597 is a deficient number, since it is larger than the sum of its proper divisors (4029319).

25493630597 is an equidigital number, since it uses as much as digits as its factorization.

25493630597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4029318.

The product of its (nonzero) digits is 6123600, while the sum is 53.

The spelling of 25493630597 in words is "twenty-five billion, four hundred ninety-three million, six hundred thirty thousand, five hundred ninety-seven".