25740139823 has 4 divisors (see below), whose sum is σ = 25745289768. Its totient is φ = 25734989880.

The previous prime is 25740139813. The next prime is 25740139837. The reversal of 25740139823 is 32893104752.

It is a happy number.

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 25740139823 - 2¹⁸ = 25739877679 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 (25740139813) 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, 2567468 + ... + 2577473.

It is an arithmetic number, because the mean of its divisors is an integer number (6436322442).

Almost surely, 2^25740139823 is an apocalyptic number.

25740139823 is a deficient number, since it is larger than the sum of its proper divisors (5149945).

25740139823 is an equidigital number, since it uses as much as digits as its factorization.

25740139823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149944.

The product of its (nonzero) digits is 362880, while the sum is 44.

The spelling of 25740139823 in words is "twenty-five billion, seven hundred forty million, one hundred thirty-nine thousand, eight hundred twenty-three".