3555555111111 has 64 divisors (see below), whose sum is σ = 5196810240000. Its totient is φ = 2155212614016.

The previous prime is 3555555111061. The next prime is 3555555111137. The reversal of 3555555111111 is 1111115555553.

3555555111111 is a nontrivial binomial coefficient, being equal to C(2666667, 2).

It is not a de Polignac number, because 3555555111111 - 2⁷ = 3555555110983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3555555111111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3555555111191) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 267993300 + ... + 268006566.

It is an arithmetic number, because the mean of its divisors is an integer number (81200160000).

Almost surely, 2^{3555555111111} is an apocalyptic number.

3555555111111 is the 2666666-th triangular number.

3555555111111 is a deficient number, since it is larger than the sum of its proper divisors (1641255128889).

3555555111111 is a wasteful number, since it uses less digits than its factorization.

3555555111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15388.

The product of its digits is 46875, while the sum is 39.

The spelling of 3555555111111 in words is "three trillion, five hundred fifty-five billion, five hundred fifty-five million, one hundred eleven thousand, one hundred eleven".