26921371408 has 20 divisors (see below), whose sum is σ = 53958784140. Its totient is φ = 12996523904.

The previous prime is 26921371313. The next prime is 26921371423. The reversal of 26921371408 is 80417312962.

It can be written as a sum of positive squares in 2 ways, for example, as 19680722944 + 7240648464 = 140288^2 + 85092^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 29009635 + ... + 29010562.

It is an arithmetic number, because the mean of its divisors is an integer number (2697939207).

Almost surely, 2^26921371408 is an apocalyptic number.

It is an amenable number.

26921371408 is an abundant number, since it is smaller than the sum of its proper divisors (27037412732).

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

26921371408 is a wasteful number, since it uses less digits than its factorization.

26921371408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58020234 (or 58020228 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 26921371408 in words is "twenty-six billion, nine hundred twenty-one million, three hundred seventy-one thousand, four hundred eight".