25461812971 has 4 divisors (see below), whose sum is σ = 29099214832. Its totient is φ = 21824411112.

The previous prime is 25461812941. The next prime is 25461813001. The reversal of 25461812971 is 17921816452.

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

It is an interprime number because it is at equal distance from previous prime (25461812941) and next prime (25461813001).

It is not a de Polignac number, because 25461812971 - 2¹¹ = 25461810923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25461812941) 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, 1818700920 + ... + 1818700933.

It is an arithmetic number, because the mean of its divisors is an integer number (7274803708).

Almost surely, 2^25461812971 is an apocalyptic number.

25461812971 is a deficient number, since it is larger than the sum of its proper divisors (3637401861).

25461812971 is an equidigital number, since it uses as much as digits as its factorization.

25461812971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3637401860.

The product of its digits is 241920, while the sum is 46.

The spelling of 25461812971 in words is "twenty-five billion, four hundred sixty-one million, eight hundred twelve thousand, nine hundred seventy-one".