1868553518872 has 16 divisors (see below), whose sum is σ = 3598228060560. Its totient is φ = 909026036064.

The previous prime is 1868553518857. The next prime is 1868553518939. The reversal of 1868553518872 is 2788153558681.

It is a junction number, because it is equal to n+sod(n) for n = 1868553518798 and 1868553518807.

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, 3156340108 + ... + 3156340699.

It is an arithmetic number, because the mean of its divisors is an integer number (224889253785).

Almost surely, 2^{1868553518872} is an apocalyptic number.

It is an amenable number.

1868553518872 is a deficient number, since it is larger than the sum of its proper divisors (1729674541688).

1868553518872 is a wasteful number, since it uses less digits than its factorization.

1868553518872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6312680850 (or 6312680846 counting only the distinct ones).

The product of its digits is 129024000, while the sum is 67.

The spelling of 1868553518872 in words is "one trillion, eight hundred sixty-eight billion, five hundred fifty-three million, five hundred eighteen thousand, eight hundred seventy-two".