26861683128 has 32 divisors (see below), whose sum is σ = 76747666560. Its totient is φ = 7674766560.

The previous prime is 26861683127. The next prime is 26861683157. The reversal of 26861683128 is 82138616862.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26861683127) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 79945318 + ... + 79945653.

It is an arithmetic number, because the mean of its divisors is an integer number (2398364580).

Almost surely, 2^26861683128 is an apocalyptic number.

26861683128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

26861683128 is an abundant number, since it is smaller than the sum of its proper divisors (49885983432).

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

26861683128 is a wasteful number, since it uses less digits than its factorization.

26861683128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159890987 (or 159890983 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 51.

The spelling of 26861683128 in words is "twenty-six billion, eight hundred sixty-one million, six hundred eighty-three thousand, one hundred twenty-eight".