26181978776 has 32 divisors (see below), whose sum is σ = 50428761840. Its totient is φ = 12734460288.

The previous prime is 26181978773. The next prime is 26181978803. The reversal of 26181978776 is 67787918162.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26181978773) 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, 2548466 + ... + 2558718.

Almost surely, 2^26181978776 is an apocalyptic number.

It is an amenable number.

26181978776 is a deficient number, since it is larger than the sum of its proper divisors (24246783064).

26181978776 is a wasteful number, since it uses less digits than its factorization.

26181978776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18923 (or 18919 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 62.

The spelling of 26181978776 in words is "twenty-six billion, one hundred eighty-one million, nine hundred seventy-eight thousand, seven hundred seventy-six".