25424969473 has 4 divisors (see below), whose sum is σ = 25425759748. Its totient is φ = 25424179200.

The previous prime is 25424969443. The next prime is 25424969501. The reversal of 25424969473 is 37496942452.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12124652544 + 13300316929 = 110112^2 + 115327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25424969473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25424969443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344736 + ... + 411937.

It is an arithmetic number, because the mean of its divisors is an integer number (6356439937).

Almost surely, 2^25424969473 is an apocalyptic number.

It is an amenable number.

25424969473 is a deficient number, since it is larger than the sum of its proper divisors (790275).

25424969473 is an equidigital number, since it uses as much as digits as its factorization.

25424969473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 790274.

The product of its digits is 13063680, while the sum is 55.

The spelling of 25424969473 in words is "twenty-five billion, four hundred twenty-four million, nine hundred sixty-nine thousand, four hundred seventy-three".