25431896473 has 4 divisors (see below), whose sum is σ = 26770417360. Its totient is φ = 24093375588.

The previous prime is 25431896447. The next prime is 25431896531. The reversal of 25431896473 is 37469813452.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25431896473 - 2¹³ = 25431888281 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25431896473.

It is not an unprimeable number, because it can be changed into a prime (25431896423) 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, 669260415 + ... + 669260452.

It is an arithmetic number, because the mean of its divisors is an integer number (6692604340).

Almost surely, 2^25431896473 is an apocalyptic number.

It is an amenable number.

25431896473 is a deficient number, since it is larger than the sum of its proper divisors (1338520887).

25431896473 is a wasteful number, since it uses less digits than its factorization.

25431896473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338520886.

The product of its digits is 4354560, while the sum is 52.

The spelling of 25431896473 in words is "twenty-five billion, four hundred thirty-one million, eight hundred ninety-six thousand, four hundred seventy-three".