26581868450 has 24 divisors (see below), whose sum is σ = 49449536292. Its totient is φ = 10631185920.

The previous prime is 26581868429. The next prime is 26581868461. The reversal of 26581868450 is 5486818562.

It can be written as a sum of positive squares in 6 ways, for example, as 16100818321 + 10481050129 = 126889^2 + 102377^2 .

It is a junction number, because it is equal to n+sod(n) for n = 26581868392 and 26581868401.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 341582 + ... + 412118.

Almost surely, 2^26581868450 is an apocalyptic number.

26581868450 is a deficient number, since it is larger than the sum of its proper divisors (22867667842).

26581868450 is a wasteful number, since it uses less digits than its factorization.

26581868450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78086 (or 78081 counting only the distinct ones).

The product of its (nonzero) digits is 3686400, while the sum is 53.

The spelling of 26581868450 in words is "twenty-six billion, five hundred eighty-one million, eight hundred sixty-eight thousand, four hundred fifty".