26279238816 has 72 divisors (see below), whose sum is σ = 74861576244. Its totient is φ = 8744509440.

The previous prime is 26279238803. The next prime is 26279238833. The reversal of 26279238816 is 61883297262.

26279238816 is a `hidden beast` number, since 2 + 627 + 9 + 2 + 3 + 8 + 8 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17212390416 + 9066848400 = 131196^2 + 95220^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×26279238816² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87106 + ... + 245246.

Almost surely, 2^26279238816 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 26279238816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37430788122).

26279238816 is an abundant number, since it is smaller than the sum of its proper divisors (48582337428).

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

26279238816 is a wasteful number, since it uses less digits than its factorization.

26279238816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158734 (or 158723 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The spelling of 26279238816 in words is "twenty-six billion, two hundred seventy-nine million, two hundred thirty-eight thousand, eight hundred sixteen".