25386438419 has 4 divisors (see below), whose sum is σ = 26879758344. Its totient is φ = 23893118496.

The previous prime is 25386438397. The next prime is 25386438421. The reversal of 25386438419 is 91483468352.

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 25386438419 - 2²⁸ = 25118002963 is a prime.

It is a super-2 number, since 2×25386438419² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25386438449) 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, 746659937 + ... + 746659970.

It is an arithmetic number, because the mean of its divisors is an integer number (6719939586).

Almost surely, 2^25386438419 is an apocalyptic number.

25386438419 is a deficient number, since it is larger than the sum of its proper divisors (1493319925).

25386438419 is a wasteful number, since it uses less digits than its factorization.

25386438419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1493319924.

The product of its digits is 4976640, while the sum is 53.

The spelling of 25386438419 in words is "twenty-five billion, three hundred eighty-six million, four hundred thirty-eight thousand, four hundred nineteen".