26871081618 has 16 divisors (see below), whose sum is σ = 53760813120. Its totient is φ = 8953918896.

The previous prime is 26871081617. The next prime is 26871081647. The reversal of 26871081618 is 81618017862.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26871081617) 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, 758313 + ... + 792956.

It is an arithmetic number, because the mean of its divisors is an integer number (3360050820).

Almost surely, 2^26871081618 is an apocalyptic number.

26871081618 is an abundant number, since it is smaller than the sum of its proper divisors (26889731502).

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

26871081618 is a wasteful number, since it uses less digits than its factorization.

26871081618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1554161.

The product of its (nonzero) digits is 258048, while the sum is 48.

The spelling of 26871081618 in words is "twenty-six billion, eight hundred seventy-one million, eighty-one thousand, six hundred eighteen".