25459784081903 has 4 divisors (see below), whose sum is σ = 26957418439680. Its totient is φ = 23962149724128.

The previous prime is 25459784081789. The next prime is 25459784081989. The reversal of 25459784081903 is 30918048795452.

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 25459784081903 - 2²⁰ = 25459783033327 is a prime.

It is a super-2 number, since 2×25459784081903² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25459784081903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25459784081993) 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, 748817178863 + ... + 748817178896.

It is an arithmetic number, because the mean of its divisors is an integer number (6739354609920).

Almost surely, 2^{25459784081903} is an apocalyptic number.

25459784081903 is a deficient number, since it is larger than the sum of its proper divisors (1497634357777).

25459784081903 is a wasteful number, since it uses less digits than its factorization.

25459784081903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497634357776.

The product of its (nonzero) digits is 87091200, while the sum is 65.

The spelling of 25459784081903 in words is "twenty-five trillion, four hundred fifty-nine billion, seven hundred eighty-four million, eighty-one thousand, nine hundred three".