26881409536 has 20 divisors (see below), whose sum is σ = 53710317342. Its totient is φ = 13440704512.

The previous prime is 26881409521. The next prime is 26881409561. The reversal of 26881409536 is 63590418862.

It can be written as a sum of positive squares in only one way, i.e., 25902971136 + 978438400 = 160944^2 + 31280^2 .

It is a super-2 number, since 2×26881409536² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26250865 + ... + 26251888.

Almost surely, 2^26881409536 is an apocalyptic number.

It is an amenable number.

26881409536 is a deficient number, since it is larger than the sum of its proper divisors (26828907806).

26881409536 is an frugal number, since it uses more digits than its factorization.

26881409536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52502771 (or 52502755 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 52.

The spelling of 26881409536 in words is "twenty-six billion, eight hundred eighty-one million, four hundred nine thousand, five hundred thirty-six".