25459138919 has 16 divisors (see below), whose sum is σ = 27255419136. Its totient is φ = 23697456000.

The previous prime is 25459138867. The next prime is 25459138927. The reversal of 25459138919 is 91983195452.

It is not a de Polignac number, because 25459138919 - 2¹⁶ = 25459073383 is a prime.

It is a super-2 number, since 2×25459138919² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25459138519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560864 + ... + 604554.

It is an arithmetic number, because the mean of its divisors is an integer number (1703463696).

Almost surely, 2^25459138919 is an apocalyptic number.

25459138919 is a deficient number, since it is larger than the sum of its proper divisors (1796280217).

25459138919 is a wasteful number, since it uses less digits than its factorization.

25459138919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44086.

The product of its digits is 3499200, while the sum is 56.

The spelling of 25459138919 in words is "twenty-five billion, four hundred fifty-nine million, one hundred thirty-eight thousand, nine hundred nineteen".