26897636850 has 192 divisors, whose sum is σ = 77780736000. Its totient is φ = 6024130560.

The previous prime is 26897636849. The next prime is 26897636863. The reversal of 26897636850 is 5863679862.

It is a happy number.

It is a super-2 number, since 2×26897636850² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27815067 + ... + 27816033.

It is an arithmetic number, because the mean of its divisors is an integer number (405108000).

Almost surely, 2^26897636850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26897636850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38890368000).

26897636850 is an abundant number, since it is smaller than the sum of its proper divisors (50883099150).

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

26897636850 is a wasteful number, since it uses less digits than its factorization.

26897636850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1497 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 60.

The spelling of 26897636850 in words is "twenty-six billion, eight hundred ninety-seven million, six hundred thirty-six thousand, eight hundred fifty".