26638680600 has 672 divisors, whose sum is σ = 108772561920. Its totient is φ = 5937442560.

The previous prime is 26638680511. The next prime is 26638680623. The reversal of 26638680600 is 608683662.

26638680600 is a `hidden beast` number, since 2 + 6 + 6 + 38 + 6 + 8 + 0 + 600 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 167 ways as a sum of consecutive naturals, for example, 43885497 + ... + 43886103.

Almost surely, 2^26638680600 is an apocalyptic number.

26638680600 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 26638680600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54386280960).

26638680600 is an abundant number, since it is smaller than the sum of its proper divisors (82133881320).

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

26638680600 is a wasteful number, since it uses less digits than its factorization.

26638680600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 667 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 45.

The spelling of 26638680600 in words is "twenty-six billion, six hundred thirty-eight million, six hundred eighty thousand, six hundred".