11878589720089 has 9 divisors (see below), whose sum is σ = 12031130702997. Its totient is φ = 11727958995324.

The previous prime is 11878589720069. The next prime is 11878589720111. The reversal of 11878589720089 is 98002798587811.

The square root of 11878589720089 is 3446533.

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

It is a de Polignac number, because none of the positive numbers 2^k-11878589720089 is a prime.

It is a super-2 number, since 2×11878589720089² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11878589720069) 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, 272254294 + ... + 272297920.

It is an arithmetic number, because the mean of its divisors is an integer number (1336792300333).

Almost surely, 2^{11878589720089} is an apocalyptic number.

11878589720089 is the 3446533-rd square number.

11878589720089 is the 1723267-th centered octagonal number.

It is an amenable number.

11878589720089 is a deficient number, since it is larger than the sum of its proper divisors (152540982908).

11878589720089 is an frugal number, since it uses more digits than its factorization.

11878589720089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87412 (or 43706 counting only the distinct ones).

The product of its (nonzero) digits is 162570240, while the sum is 73.

The spelling of 11878589720089 in words is "eleven trillion, eight hundred seventy-eight billion, five hundred eighty-nine million, seven hundred twenty thousand, eighty-nine".