25905980407 has 8 divisors (see below), whose sum is σ = 27358284800. Its totient is φ = 24462559224.

The previous prime is 25905980393. The next prime is 25905980413. The reversal of 25905980407 is 70408950952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25905980407 - 2²³ = 25897591799 is a prime.

It is a super-2 number, since 2×25905980407² (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 (25905984407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2214807 + ... + 2226472.

It is an arithmetic number, because the mean of its divisors is an integer number (3419785600).

Almost surely, 2^25905980407 is an apocalyptic number.

25905980407 is a deficient number, since it is larger than the sum of its proper divisors (1452304393).

25905980407 is a wasteful number, since it uses less digits than its factorization.

25905980407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4441605.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 25905980407 in words is "twenty-five billion, nine hundred five million, nine hundred eighty thousand, four hundred seven".