25574731073 has 4 divisors (see below), whose sum is σ = 25667058900. Its totient is φ = 25482403248.

The previous prime is 25574731057. The next prime is 25574731157. The reversal of 25574731073 is 37013747552.

It is a happy number.

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 12695204929 + 12879526144 = 112673^2 + 113488^2 .

It is a cyclic number.

It is not a de Polignac number, because 25574731073 - 2⁴ = 25574731057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25574131073) 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, 46163498 + ... + 46164051.

It is an arithmetic number, because the mean of its divisors is an integer number (6416764725).

Almost surely, 2^25574731073 is an apocalyptic number.

It is an amenable number.

25574731073 is a deficient number, since it is larger than the sum of its proper divisors (92327827).

25574731073 is an equidigital number, since it uses as much as digits as its factorization.

25574731073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92327826.

The product of its (nonzero) digits is 617400, while the sum is 44.

The spelling of 25574731073 in words is "twenty-five billion, five hundred seventy-four million, seven hundred thirty-one thousand, seventy-three".