18550779711 has 16 divisors (see below), whose sum is σ = 25826428800. Its totient is φ = 11829130208.

The previous prime is 18550779649. The next prime is 18550779721. The reversal of 18550779711 is 11797705581.

It is a cyclic number.

It is not a de Polignac number, because 18550779711 - 2²⁶ = 18483670847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18550779721) 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, 987081 + ... + 1005698.

It is an arithmetic number, because the mean of its divisors is an integer number (1614151800).

Almost surely, 2^18550779711 is an apocalyptic number.

18550779711 is a deficient number, since it is larger than the sum of its proper divisors (7275649089).

18550779711 is a wasteful number, since it uses less digits than its factorization.

18550779711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1992918.

The product of its (nonzero) digits is 617400, while the sum is 51.

The spelling of 18550779711 in words is "eighteen billion, five hundred fifty million, seven hundred seventy-nine thousand, seven hundred eleven".