26644220663100 has 144 divisors (see below), whose sum is σ = 77459437299552. Its totient is φ = 7071198704640.

The previous prime is 26644220663077. The next prime is 26644220663141. The reversal of 26644220663100 is 136602244662.

It is a super-2 number, since 2×26644220663100² (a number of 28 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 47 ways as a sum of consecutive naturals, for example, 64223934 + ... + 64637466.

Almost surely, 2^{26644220663100} is an apocalyptic number.

26644220663100 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 26644220663100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38729718649776).

26644220663100 is an abundant number, since it is smaller than the sum of its proper divisors (50815216636452).

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

26644220663100 is a wasteful number, since it uses less digits than its factorization.

26644220663100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414576 (or 414569 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 42.

The spelling of 26644220663100 in words is "twenty-six trillion, six hundred forty-four billion, two hundred twenty million, six hundred sixty-three thousand, one hundred".