26139887424 has 168 divisors, whose sum is σ = 86143843968. Its totient is φ = 7423626240.

The previous prime is 26139887369. The next prime is 26139887443. The reversal of 26139887424 is 42478893162.

26139887424 is a `hidden beast` number, since 2 + 6 + 139 + 8 + 87 + 424 = 666.

It is a tau number, because it is divible by the number of its divisors (168).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 653934 + ... + 692754.

It is an arithmetic number, because the mean of its divisors is an integer number (512760976).

Almost surely, 2^26139887424 is an apocalyptic number.

26139887424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26139887424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43071921984).

26139887424 is an abundant number, since it is smaller than the sum of its proper divisors (60003956544).

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

26139887424 is a wasteful number, since it uses less digits than its factorization.

26139887424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39013 (or 39000 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 26139887424 in words is "twenty-six billion, one hundred thirty-nine million, eight hundred eighty-seven thousand, four hundred twenty-four".