26544350440 has 16 divisors (see below), whose sum is σ = 59724788580. Its totient is φ = 10617740160.

The previous prime is 26544350423. The next prime is 26544350473. The reversal of 26544350440 is 4405344562.

It can be written as a sum of positive squares in 2 ways, for example, as 25350371524 + 1193978916 = 159218^2 + 34554^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 26544350440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331804341 + ... + 331804420.

Almost surely, 2^26544350440 is an apocalyptic number.

26544350440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26544350440 is an abundant number, since it is smaller than the sum of its proper divisors (33180438140).

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

26544350440 is a wasteful number, since it uses less digits than its factorization.

26544350440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663608772 (or 663608768 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 37.

The spelling of 26544350440 in words is "twenty-six billion, five hundred forty-four million, three hundred fifty thousand, four hundred forty".