2659978189089 has 16 divisors (see below), whose sum is σ = 4243839846400. Its totient is φ = 1636909654608.

The previous prime is 2659978189061. The next prime is 2659978189163. The reversal of 2659978189089 is 9809818799562.

2659978189089 is a `hidden beast` number, since 2 + 6 + 599 + 7 + 8 + 18 + 9 + 0 + 8 + 9 = 666.

It is not a de Polignac number, because 2659978189089 - 2¹³ = 2659978180897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2659978188999 and 2659978189017.

It is not an unprimeable number, because it can be changed into a prime (2659978189009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3789142369 + ... + 3789143070.

It is an arithmetic number, because the mean of its divisors is an integer number (265239990400).

Almost surely, 2^{2659978189089} is an apocalyptic number.

It is an amenable number.

2659978189089 is a deficient number, since it is larger than the sum of its proper divisors (1583861657311).

2659978189089 is a wasteful number, since it uses less digits than its factorization.

2659978189089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7578285461 (or 7578285455 counting only the distinct ones).

The product of its (nonzero) digits is 1410877440, while the sum is 81.

The spelling of 2659978189089 in words is "two trillion, six hundred fifty-nine billion, nine hundred seventy-eight million, one hundred eighty-nine thousand, eighty-nine".