26390322816 has 512 divisors, whose sum is σ = 87516979200. Its totient is φ = 6934118400.

The previous prime is 26390322781. The next prime is 26390322839. The reversal of 26390322816 is 61822309362.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 62983855 + ... + 62984273.

It is an arithmetic number, because the mean of its divisors is an integer number (170931600).

Almost surely, 2^26390322816 is an apocalyptic number.

26390322816 is a gapful number since it is divisible by the number (26) 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 26390322816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43758489600).

26390322816 is an abundant number, since it is smaller than the sum of its proper divisors (61126656384).

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

26390322816 is a wasteful number, since it uses less digits than its factorization.

26390322816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 26390322816 in words is "twenty-six billion, three hundred ninety million, three hundred twenty-two thousand, eight hundred sixteen".