25571795971 has 4 divisors (see below), whose sum is σ = 25578278712. Its totient is φ = 25565313232.

The previous prime is 25571795969. The next prime is 25571795993. The reversal of 25571795971 is 17959717552.

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

It is a cyclic number.

It is not a de Polignac number, because 25571795971 - 2¹ = 25571795969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25571790971) 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, 3235450 + ... + 3243343.

It is an arithmetic number, because the mean of its divisors is an integer number (6394569678).

Almost surely, 2^25571795971 is an apocalyptic number.

25571795971 is a deficient number, since it is larger than the sum of its proper divisors (6482741).

25571795971 is an equidigital number, since it uses as much as digits as its factorization.

25571795971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6482740.

The product of its digits is 6945750, while the sum is 58.

The spelling of 25571795971 in words is "twenty-five billion, five hundred seventy-one million, seven hundred ninety-five thousand, nine hundred seventy-one".