25540393227839 has 16 divisors (see below), whose sum is σ = 29210428837440. Its totient is φ = 21875715214080.

The previous prime is 25540393227827. The next prime is 25540393227883. The reversal of 25540393227839 is 93872239304552.

It is a de Polignac number, because none of the positive numbers 2^k-25540393227839 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 (25540393227539) 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, 55243067 + ... + 55703475.

It is an arithmetic number, because the mean of its divisors is an integer number (1825651802340).

Almost surely, 2^{25540393227839} is an apocalyptic number.

25540393227839 is a deficient number, since it is larger than the sum of its proper divisors (3670035609601).

25540393227839 is a wasteful number, since it uses less digits than its factorization.

25540393227839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466210.

The product of its (nonzero) digits is 97977600, while the sum is 62.

The spelling of 25540393227839 in words is "twenty-five trillion, five hundred forty billion, three hundred ninety-three million, two hundred twenty-seven thousand, eight hundred thirty-nine".