1868542566 has 16 divisors (see below), whose sum is σ = 4076820288. Its totient is φ = 566225000.

The previous prime is 1868542519. The next prime is 1868542583. The reversal of 1868542566 is 6652458681.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14155560 + ... + 14155691.

It is an arithmetic number, because the mean of its divisors is an integer number (254801268).

Almost surely, 2^1868542566 is an apocalyptic number.

1868542566 is an abundant number, since it is smaller than the sum of its proper divisors (2208277722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1868542566 is a wasteful number, since it uses less digits than its factorization.

1868542566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28311267.

The product of its digits is 2764800, while the sum is 51.

The square root of 1868542566 is about 43226.6418543009. The cubic root of 1868542566 is about 1231.6888177044.

It can be divided in two parts, 186854 and 2566, that added together give a triangular number (189420 = T₆₁₅).

The spelling of 1868542566 in words is "one billion, eight hundred sixty-eight million, five hundred forty-two thousand, five hundred sixty-six".