26860915449 has 9 divisors (see below), whose sum is σ = 38799810309. Its totient is φ = 17906949180.

The previous prime is 26860915423. The next prime is 26860915481. The reversal of 26860915449 is 94451906862.

The square root of 26860915449 is 163893.

It is a perfect power (a square), and thus also a powerful number.

26860915449 is a `hidden beast` number, since 2 + 6 + 8 + 6 + 0 + 91 + 544 + 9 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 26860915449 - 2²⁵ = 26827361017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26860915395 and 26860915404.

It is not an unprimeable number, because it can be changed into a prime (26860911449) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 464364 + ... + 518994.

Almost surely, 2^26860915449 is an apocalyptic number.

26860915449 is the 163893-rd square number.

26860915449 is the 81947-th centered octagonal number.

It is an amenable number.

26860915449 is a deficient number, since it is larger than the sum of its proper divisors (11938894860).

26860915449 is an frugal number, since it uses more digits than its factorization.

26860915449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109268 (or 54634 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 54.

The spelling of 26860915449 in words is "twenty-six billion, eight hundred sixty million, nine hundred fifteen thousand, four hundred forty-nine".