25544958838 has 16 divisors (see below), whose sum is σ = 43892503200. Its totient is φ = 10922553216.

The previous prime is 25544958833. The next prime is 25544958869. The reversal of 25544958838 is 83885944552.

It is a super-2 number, since 2×25544958838² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25544958833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2100913 + ... + 2113036.

It is an arithmetic number, because the mean of its divisors is an integer number (2743281450).

Almost surely, 2^25544958838 is an apocalyptic number.

25544958838 is a deficient number, since it is larger than the sum of its proper divisors (18347544362).

25544958838 is a wasteful number, since it uses less digits than its factorization.

25544958838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4214391.

The product of its digits is 55296000, while the sum is 61.

The spelling of 25544958838 in words is "twenty-five billion, five hundred forty-four million, nine hundred fifty-eight thousand, eight hundred thirty-eight".