1855216868888 has 16 divisors (see below), whose sum is σ = 3590742327360. Its totient is φ = 897685581600.

The previous prime is 1855216868863. The next prime is 1855216868929. The reversal of 1855216868888 is 8888686125581.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3740356343 + ... + 3740356838.

It is an arithmetic number, because the mean of its divisors is an integer number (224421395460).

Almost surely, 2^{1855216868888} is an apocalyptic number.

It is an amenable number.

1855216868888 is a deficient number, since it is larger than the sum of its proper divisors (1735525458472).

1855216868888 is a wasteful number, since it uses less digits than its factorization.

1855216868888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7480713218 (or 7480713214 counting only the distinct ones).

The product of its digits is 471859200, while the sum is 74.

The spelling of 1855216868888 in words is "one trillion, eight hundred fifty-five billion, two hundred sixteen million, eight hundred sixty-eight thousand, eight hundred eighty-eight".