25738726872 has 128 divisors (see below), whose sum is σ = 68159232000. Its totient is φ = 8088299520.

The previous prime is 25738726837. The next prime is 25738726873. The reversal of 25738726872 is 27862783752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25738726873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4957654 + ... + 4962842.

It is an arithmetic number, because the mean of its divisors is an integer number (532494000).

Almost surely, 2^25738726872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25738726872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34079616000).

25738726872 is an abundant number, since it is smaller than the sum of its proper divisors (42420505128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25738726872 is a wasteful number, since it uses less digits than its factorization.

25738726872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5401 (or 5397 counting only the distinct ones).

The product of its digits is 15805440, while the sum is 57.

The spelling of 25738726872 in words is "twenty-five billion, seven hundred thirty-eight million, seven hundred twenty-six thousand, eight hundred seventy-two".