25630669671 has 4 divisors (see below), whose sum is σ = 34174226232. Its totient is φ = 17087113112.

The previous prime is 25630669651. The next prime is 25630669681. The reversal of 25630669671 is 17696603652.

It is a happy number.

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 25630669671 - 2⁶ = 25630669607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25630669651) 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, 4271778276 + ... + 4271778281.

It is an arithmetic number, because the mean of its divisors is an integer number (8543556558).

Almost surely, 2^25630669671 is an apocalyptic number.

25630669671 is a deficient number, since it is larger than the sum of its proper divisors (8543556561).

25630669671 is an equidigital number, since it uses as much as digits as its factorization.

25630669671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8543556560.

The product of its (nonzero) digits is 2449440, while the sum is 51.

The spelling of 25630669671 in words is "twenty-five billion, six hundred thirty million, six hundred sixty-nine thousand, six hundred seventy-one".