25540323205 has 32 divisors (see below), whose sum is σ = 32139638784. Its totient is φ = 19447228416.

The previous prime is 25540323143. The next prime is 25540323217. The reversal of 25540323205 is 50232304552.

It is a cyclic number.

It is not a de Polignac number, because 25540323205 - 2⁷ = 25540323077 is a prime.

It is a super-2 number, since 2×25540323205² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41394057 + ... + 41394673.

It is an arithmetic number, because the mean of its divisors is an integer number (1004363712).

Almost surely, 2^25540323205 is an apocalyptic number.

It is an amenable number.

25540323205 is a deficient number, since it is larger than the sum of its proper divisors (6599315579).

25540323205 is a wasteful number, since it uses less digits than its factorization.

25540323205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845.

The product of its (nonzero) digits is 36000, while the sum is 31.

Adding to 25540323205 its reverse (50232304552), we get a palindrome (75772627757).

The spelling of 25540323205 in words is "twenty-five billion, five hundred forty million, three hundred twenty-three thousand, two hundred five".