26866047518 has 4 divisors (see below), whose sum is σ = 40299071280. Its totient is φ = 13433023758.

The previous prime is 26866047511. The next prime is 26866047547. The reversal of 26866047518 is 81574066862.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 26866047518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26866047511) 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 as a sum of consecutive naturals, namely, 6716511878 + ... + 6716511881.

It is an arithmetic number, because the mean of its divisors is an integer number (10074767820).

Almost surely, 2^26866047518 is an apocalyptic number.

26866047518 is a deficient number, since it is larger than the sum of its proper divisors (13433023762).

26866047518 is a wasteful number, since it uses less digits than its factorization.

26866047518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13433023761.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 26866047518 in words is "twenty-six billion, eight hundred sixty-six million, forty-seven thousand, five hundred eighteen".