1868388918789 has 16 divisors (see below), whose sum is σ = 2637900172800. Its totient is φ = 1172244840960.

The previous prime is 1868388918779. The next prime is 1868388918863. The reversal of 1868388918789 is 9878198838681.

It is not a de Polignac number, because 1868388918789 - 2⁷ = 1868388918661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1868388918779) 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, 430032 + ... + 1980329.

It is an arithmetic number, because the mean of its divisors is an integer number (164868760800).

Almost surely, 2^{1868388918789} is an apocalyptic number.

It is an amenable number.

1868388918789 is a deficient number, since it is larger than the sum of its proper divisors (769511254011).

1868388918789 is a wasteful number, since it uses less digits than its factorization.

1868388918789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425580.

The product of its digits is 2675441664, while the sum is 84.

The spelling of 1868388918789 in words is "one trillion, eight hundred sixty-eight billion, three hundred eighty-eight million, nine hundred eighteen thousand, seven hundred eighty-nine".