26238664663488 has 140 divisors (see below), whose sum is σ = 77895203752080. Its totient is φ = 8733224521728.

The previous prime is 26238664663457. The next prime is 26238664663513. The reversal of 26238664663488 is 88436646683262.

26238664663488 is a `hidden beast` number, since 2 + 6 + 2 + 3 + 86 + 6 + 4 + 6 + 63 + 488 = 666.

It is a super-2 number, since 2×26238664663488² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

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 polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 271548 + ... + 7249211.

Almost surely, 2^{26238664663488} 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 26238664663488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38947601876040).

26238664663488 is an abundant number, since it is smaller than the sum of its proper divisors (51656539088592).

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

26238664663488 is an equidigital number, since it uses as much as digits as its factorization.

26238664663488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7521456 (or 7521437 counting only the distinct ones).

The product of its digits is 2293235712, while the sum is 72.

The spelling of 26238664663488 in words is "twenty-six trillion, two hundred thirty-eight billion, six hundred sixty-four million, six hundred sixty-three thousand, four hundred eighty-eight".