13541278689 has 27 divisors (see below), whose sum is σ = 19850778129. Its totient is φ = 8895093480.

The previous prime is 13541278657. The next prime is 13541278691. The reversal of 13541278689 is 98687214531.

The square root of 13541278689 is 116367.

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

13541278689 is a `hidden beast` number, since 13 + 541 + 2 + 7 + 8 + 6 + 89 = 666.

It is not a de Polignac number, because 13541278689 - 2⁵ = 13541278657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13541273689) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 27578734 + ... + 27579224.

Almost surely, 2^13541278689 is an apocalyptic number.

13541278689 is the 116367-th square number.

13541278689 is the 58184-th centered octagonal number.

It is an amenable number.

13541278689 is a deficient number, since it is larger than the sum of its proper divisors (6309499440).

13541278689 is an frugal number, since it uses more digits than its factorization.

13541278689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146 (or 573 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

It can be divided in two parts, 13541 and 278689, that added together give a triangular number (292230 = T₇₆₄).

The spelling of 13541278689 in words is "thirteen billion, five hundred forty-one million, two hundred seventy-eight thousand, six hundred eighty-nine".