26197911982 has 32 divisors (see below), whose sum is σ = 45404133984. Its totient is φ = 11204428800.

The previous prime is 26197911947. The next prime is 26197912007. The reversal of 26197911982 is 28911979162.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1653048 + ... + 1668820.

It is an arithmetic number, because the mean of its divisors is an integer number (1418879187).

Almost surely, 2^26197911982 is an apocalyptic number.

26197911982 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

26197911982 is a deficient number, since it is larger than the sum of its proper divisors (19206222002).

26197911982 is a wasteful number, since it uses less digits than its factorization.

26197911982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20244.

The product of its digits is 979776, while the sum is 55.

The spelling of 26197911982 in words is "twenty-six billion, one hundred ninety-seven million, nine hundred eleven thousand, nine hundred eighty-two".