26591622240 has 192 divisors, whose sum is σ = 84564043200. Its totient is φ = 7023697920.

The previous prime is 26591622229. The next prime is 26591622263. The reversal of 26591622240 is 4222619562.

It is a super-2 number, since 2×26591622240² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30320682 + ... + 30321558.

It is an arithmetic number, because the mean of its divisors is an integer number (440437725).

Almost surely, 2^26591622240 is an apocalyptic number.

26591622240 is a gapful number since it is divisible by the number (20) 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 26591622240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42282021600).

26591622240 is an abundant number, since it is smaller than the sum of its proper divisors (57972420960).

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

26591622240 is a wasteful number, since it uses less digits than its factorization.

26591622240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1425 (or 1417 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 26591622240 in words is "twenty-six billion, five hundred ninety-one million, six hundred twenty-two thousand, two hundred forty".