25742871443 has 4 divisors (see below), whose sum is σ = 26290592160. Its totient is φ = 25195150728.

The previous prime is 25742871403. The next prime is 25742871457. The reversal of 25742871443 is 34417824752.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25742871443 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47), and also a Moran number because the ratio is a prime number: 547720669 = 25742871443 / (2 + 5 + 7 + 4 + 2 + 8 + 7 + 1 + 4 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25742871403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273860288 + ... + 273860381.

It is an arithmetic number, because the mean of its divisors is an integer number (6572648040).

Almost surely, 2^25742871443 is an apocalyptic number.

25742871443 is a deficient number, since it is larger than the sum of its proper divisors (547720717).

25742871443 is an equidigital number, since it uses as much as digits as its factorization.

25742871443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547720716.

The product of its digits is 1505280, while the sum is 47.

The spelling of 25742871443 in words is "twenty-five billion, seven hundred forty-two million, eight hundred seventy-one thousand, four hundred forty-three".