25172926573 has 4 divisors (see below), whose sum is σ = 25339634848. Its totient is φ = 25006218300.

The previous prime is 25172926553. The next prime is 25172926577. The reversal of 25172926573 is 37562927152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25172926573 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 (25172926577) 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, 83353911 + ... + 83354212.

It is an arithmetic number, because the mean of its divisors is an integer number (6334908712).

Almost surely, 2^25172926573 is an apocalyptic number.

It is an amenable number.

25172926573 is a deficient number, since it is larger than the sum of its proper divisors (166708275).

25172926573 is a wasteful number, since it uses less digits than its factorization.

25172926573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166708274.

The product of its digits is 1587600, while the sum is 49.

The spelling of 25172926573 in words is "twenty-five billion, one hundred seventy-two million, nine hundred twenty-six thousand, five hundred seventy-three".