25690004871 has 4 divisors (see below), whose sum is σ = 34253339832. Its totient is φ = 17126669912.

The previous prime is 25690004843. The next prime is 25690004927. The reversal of 25690004871 is 17840009652.

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 25690004871 - 2⁶ = 25690004807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25690009871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4281667476 + ... + 4281667481.

It is an arithmetic number, because the mean of its divisors is an integer number (8563334958).

Almost surely, 2^25690004871 is an apocalyptic number.

25690004871 is a deficient number, since it is larger than the sum of its proper divisors (8563334961).

25690004871 is an equidigital number, since it uses as much as digits as its factorization.

25690004871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8563334960.

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 25690004871 in words is "twenty-five billion, six hundred ninety million, four thousand, eight hundred seventy-one".