25540983813 has 16 divisors (see below), whose sum is σ = 34157168640. Its totient is φ = 16976120304.

The previous prime is 25540983803. The next prime is 25540983817. The reversal of 25540983813 is 31838904552.

It is not a de Polignac number, because 25540983813 - 2¹⁸ = 25540721669 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25540983817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1964428 + ... + 1977386.

It is an arithmetic number, because the mean of its divisors is an integer number (2134823040).

Almost surely, 2^25540983813 is an apocalyptic number.

It is an amenable number.

25540983813 is a deficient number, since it is larger than the sum of its proper divisors (8616184827).

25540983813 is a wasteful number, since it uses less digits than its factorization.

25540983813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14888.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 25540983813 in words is "twenty-five billion, five hundred forty million, nine hundred eighty-three thousand, eight hundred thirteen".