25840403861 has 8 divisors (see below), whose sum is σ = 27053520480. Its totient is φ = 24648758512.

The previous prime is 25840403851. The next prime is 25840403867. The reversal of 25840403861 is 16830404852.

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 25840403861 - 2¹⁴ = 25840387477 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 (25840403867) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5365355 + ... + 5370168.

It is an arithmetic number, because the mean of its divisors is an integer number (3381690060).

Almost surely, 2^25840403861 is an apocalyptic number.

It is an amenable number.

25840403861 is a deficient number, since it is larger than the sum of its proper divisors (1213116619).

25840403861 is a wasteful number, since it uses less digits than its factorization.

25840403861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10735635.

The product of its (nonzero) digits is 184320, while the sum is 41.

Subtracting from 25840403861 its reverse (16830404852), we obtain a palindrome (9009999009).

The spelling of 25840403861 in words is "twenty-five billion, eight hundred forty million, four hundred three thousand, eight hundred sixty-one".