25424400443 has 4 divisors (see below), whose sum is σ = 27380123568. Its totient is φ = 23468677320.

The previous prime is 25424400431. The next prime is 25424400451. The reversal of 25424400443 is 34400442452.

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 25424400443 - 2¹⁴ = 25424384059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25424400143) 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, 977861543 + ... + 977861568.

It is an arithmetic number, because the mean of its divisors is an integer number (6845030892).

Almost surely, 2^25424400443 is an apocalyptic number.

25424400443 is a deficient number, since it is larger than the sum of its proper divisors (1955723125).

25424400443 is a wasteful number, since it uses less digits than its factorization.

25424400443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955723124.

The product of its (nonzero) digits is 61440, while the sum is 32.

Adding to 25424400443 its reverse (34400442452), we get a palindrome (59824842895).

The spelling of 25424400443 in words is "twenty-five billion, four hundred twenty-four million, four hundred thousand, four hundred forty-three".