25573422243445 has 4 divisors (see below), whose sum is σ = 30688106692140. Its totient is φ = 20458737794752.

The previous prime is 25573422243401. The next prime is 25573422243463. The reversal of 25573422243445 is 54434222437552.

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 16571730163921 + 9001692079524 = 4070839^2 + 3000282^2 .

It is a cyclic number.

It is not a de Polignac number, because 25573422243445 - 2⁹ = 25573422242933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25573422243392 and 25573422243401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2557342224340 + ... + 2557342224349.

It is an arithmetic number, because the mean of its divisors is an integer number (7672026673035).

Almost surely, 2^{25573422243445} is an apocalyptic number.

It is an amenable number.

25573422243445 is a deficient number, since it is larger than the sum of its proper divisors (5114684448695).

25573422243445 is an equidigital number, since it uses as much as digits as its factorization.

25573422243445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5114684448694.

The product of its digits is 32256000, while the sum is 52.

The spelling of 25573422243445 in words is "twenty-five trillion, five hundred seventy-three billion, four hundred twenty-two million, two hundred forty-three thousand, four hundred forty-five".