25557919383 has 4 divisors (see below), whose sum is σ = 34077225848. Its totient is φ = 17038612920.

The previous prime is 25557919379. The next prime is 25557919451. The reversal of 25557919383 is 38391975552.

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

It is not a de Polignac number, because 25557919383 - 2² = 25557919379 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25557919333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4259653228 + ... + 4259653233.

It is an arithmetic number, because the mean of its divisors is an integer number (8519306462).

Almost surely, 2^25557919383 is an apocalyptic number.

25557919383 is a deficient number, since it is larger than the sum of its proper divisors (8519306465).

25557919383 is an equidigital number, since it uses as much as digits as its factorization.

25557919383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8519306464.

The product of its digits is 10206000, while the sum is 57.

The spelling of 25557919383 in words is "twenty-five billion, five hundred fifty-seven million, nine hundred nineteen thousand, three hundred eighty-three".