26523363640 has 64 divisors (see below), whose sum is σ = 60696249120. Its totient is φ = 10428480000.

The previous prime is 26523363623. The next prime is 26523363649. The reversal of 26523363640 is 4636332562.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 26523363593 and 26523363602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26523363649) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5197090 + ... + 5202190.

Almost surely, 2^26523363640 is an apocalyptic number.

26523363640 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 26523363640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30348124560).

26523363640 is an abundant number, since it is smaller than the sum of its proper divisors (34172885480).

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

26523363640 is a wasteful number, since it uses less digits than its factorization.

26523363640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7304 (or 7300 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 40.

The spelling of 26523363640 in words is "twenty-six billion, five hundred twenty-three million, three hundred sixty-three thousand, six hundred forty".