26861366826 has 64 divisors (see below), whose sum is σ = 69506553600. Its totient is φ = 7529865408.

The previous prime is 26861366801. The next prime is 26861366837. The reversal of 26861366826 is 62866316862.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 650361 + ... + 690428.

It is an arithmetic number, because the mean of its divisors is an integer number (1086039900).

Almost surely, 2^26861366826 is an apocalyptic number.

26861366826 is an abundant number, since it is smaller than the sum of its proper divisors (42645186774).

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

26861366826 is a wasteful number, since it uses less digits than its factorization.

26861366826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340860 (or 1340854 counting only the distinct ones).

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

It can be divided in two parts, 2686136 and 6826, that added together give a palindrome (2692962).

The spelling of 26861366826 in words is "twenty-six billion, eight hundred sixty-one million, three hundred sixty-six thousand, eight hundred twenty-six".