25989711138 has 16 divisors (see below), whose sum is σ = 57754913760. Its totient is φ = 8663237028.

The previous prime is 25989711109. The next prime is 25989711151. The reversal of 25989711138 is 83111798952.

25989711138 is a `hidden beast` number, since 2 + 598 + 9 + 7 + 1 + 11 + 38 = 666.

It is a super-4 number, since 4×25989711138⁴ (a number of 43 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 481290947 = 25989711138 / (2 + 5 + 9 + 8 + 9 + 7 + 1 + 1 + 1 + 3 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240645420 + ... + 240645527.

It is an arithmetic number, because the mean of its divisors is an integer number (3609682110).

Almost surely, 2^25989711138 is an apocalyptic number.

25989711138 is an abundant number, since it is smaller than the sum of its proper divisors (31765202622).

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

25989711138 is a wasteful number, since it uses less digits than its factorization.

25989711138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481290958 (or 481290952 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 54.

The spelling of 25989711138 in words is "twenty-five billion, nine hundred eighty-nine million, seven hundred eleven thousand, one hundred thirty-eight".