25955316571 has 4 divisors (see below), whose sum is σ = 26185009752. Its totient is φ = 25725623392.

The previous prime is 25955316553. The next prime is 25955316599. The reversal of 25955316571 is 17561355952.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 25955316571 - 2²¹ = 25953219419 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25955316271) 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, 114846421 + ... + 114846646.

It is an arithmetic number, because the mean of its divisors is an integer number (6546252438).

Almost surely, 2^25955316571 is an apocalyptic number.

25955316571 is a deficient number, since it is larger than the sum of its proper divisors (229693181).

25955316571 is a wasteful number, since it uses less digits than its factorization.

25955316571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229693180.

The product of its digits is 1417500, while the sum is 49.

The spelling of 25955316571 in words is "twenty-five billion, nine hundred fifty-five million, three hundred sixteen thousand, five hundred seventy-one".