1866481680842 has 16 divisors (see below), whose sum is σ = 2828435156064. Its totient is φ = 923676450000.

The previous prime is 1866481680829. The next prime is 1866481680851. The reversal of 1866481680842 is 2480861846681.

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, 1044584 + ... + 2196387.

It is an arithmetic number, because the mean of its divisors is an integer number (176777197254).

Almost surely, 2^{1866481680842} is an apocalyptic number.

1866481680842 is a deficient number, since it is larger than the sum of its proper divisors (961953475222).

1866481680842 is a wasteful number, since it uses less digits than its factorization.

1866481680842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3243925.

The product of its (nonzero) digits is 28311552, while the sum is 62.

The spelling of 1866481680842 in words is "one trillion, eight hundred sixty-six billion, four hundred eighty-one million, six hundred eighty thousand, eight hundred forty-two".