26198031718 has 4 divisors (see below), whose sum is σ = 39297047580. Its totient is φ = 13099015858.

The previous prime is 26198031677. The next prime is 26198031719. The reversal of 26198031718 is 81713089162.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26198031719) 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, 6549507928 + ... + 6549507931.

It is an arithmetic number, because the mean of its divisors is an integer number (9824261895).

Almost surely, 2^26198031718 is an apocalyptic number.

26198031718 is a deficient number, since it is larger than the sum of its proper divisors (13099015862).

26198031718 is a wasteful number, since it uses less digits than its factorization.

26198031718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13099015861.

The product of its (nonzero) digits is 145152, while the sum is 46.

The spelling of 26198031718 in words is "twenty-six billion, one hundred ninety-eight million, thirty-one thousand, seven hundred eighteen".