26521867860 has 48 divisors (see below), whose sum is σ = 74705936256. Its totient is φ = 7030145152.

The previous prime is 26521867831. The next prime is 26521867861. The reversal of 26521867860 is 6876812562.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26521867861) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1313427 + ... + 1333466.

It is an arithmetic number, because the mean of its divisors is an integer number (1556373672).

Almost surely, 2^26521867860 is an apocalyptic number.

26521867860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26521867860 is an abundant number, since it is smaller than the sum of its proper divisors (48184068396).

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

26521867860 is a wasteful number, since it uses less digits than its factorization.

26521867860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647072 (or 2647070 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 51.

The spelling of 26521867860 in words is "twenty-six billion, five hundred twenty-one million, eight hundred sixty-seven thousand, eight hundred sixty".