25434424457 has 6 divisors (see below), whose sum is σ = 27541418382. Its totient is φ = 23477930112.

The previous prime is 25434424441. The next prime is 25434424487. The reversal of 25434424457 is 75442443452.

It can be written as a sum of positive squares in 3 ways, for example, as 18412681 + 25416011776 = 4291^2 + 159424^2 .

It is not a de Polignac number, because 25434424457 - 2⁴ = 25434424441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25434424487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75249608 + ... + 75249945.

It is an arithmetic number, because the mean of its divisors is an integer number (4590236397).

Almost surely, 2^25434424457 is an apocalyptic number.

It is an amenable number.

25434424457 is a deficient number, since it is larger than the sum of its proper divisors (2106993925).

25434424457 is a wasteful number, since it uses less digits than its factorization.

25434424457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150499579 (or 150499566 counting only the distinct ones).

The product of its digits is 2150400, while the sum is 44.

The spelling of 25434424457 in words is "twenty-five billion, four hundred thirty-four million, four hundred twenty-four thousand, four hundred fifty-seven".