25432161847 has 4 divisors (see below), whose sum is σ = 25432574056. Its totient is φ = 25431749640.

The previous prime is 25432161779. The next prime is 25432161851. The reversal of 25432161847 is 74816123452.

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 25432161847 - 2¹⁹ = 25431637559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25432161947) 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, 92793 + ... + 243874.

It is an arithmetic number, because the mean of its divisors is an integer number (6358143514).

Almost surely, 2^25432161847 is an apocalyptic number.

25432161847 is a deficient number, since it is larger than the sum of its proper divisors (412209).

25432161847 is an equidigital number, since it uses as much as digits as its factorization.

25432161847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412208.

The product of its digits is 322560, while the sum is 43.

The spelling of 25432161847 in words is "twenty-five billion, four hundred thirty-two million, one hundred sixty-one thousand, eight hundred forty-seven".