25597607609 has 8 divisors (see below), whose sum is σ = 29358519168. Its totient is φ = 21862723680.

The previous prime is 25597607599. The next prime is 25597607611. The reversal of 25597607609 is 90670679552.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-25597607609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25597607669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6504797 + ... + 6508730.

It is an arithmetic number, because the mean of its divisors is an integer number (3669814896).

Almost surely, 2^25597607609 is an apocalyptic number.

It is an amenable number.

25597607609 is a deficient number, since it is larger than the sum of its proper divisors (3760911559).

25597607609 is a wasteful number, since it uses less digits than its factorization.

25597607609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13013815.

The product of its (nonzero) digits is 7144200, while the sum is 56.

The spelling of 25597607609 in words is "twenty-five billion, five hundred ninety-seven million, six hundred seven thousand, six hundred nine".