26166828636 has 72 divisors (see below), whose sum is σ = 71483987120. Its totient is φ = 8022841344.

The previous prime is 26166828629. The next prime is 26166828637. The reversal of 26166828636 is 63682866162.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26166828637) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33660 + ... + 231228.

Almost surely, 2^26166828636 is an apocalyptic number.

26166828636 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 26166828636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35741993560).

26166828636 is an abundant number, since it is smaller than the sum of its proper divisors (45317158484).

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

26166828636 is a wasteful number, since it uses less digits than its factorization.

26166828636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197875 (or 197870 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 54.

The spelling of 26166828636 in words is "twenty-six billion, one hundred sixty-six million, eight hundred twenty-eight thousand, six hundred thirty-six".