1868191712408 has 32 divisors (see below), whose sum is σ = 4071119961600. Its totient is φ = 787083189792.

The previous prime is 1868191712383. The next prime is 1868191712479. The reversal of 1868191712408 is 8042171918681.

It is a Harshad number since it is a multiple of its sum of digits (56).

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, 282713360 + ... + 282719967.

It is an arithmetic number, because the mean of its divisors is an integer number (127222498800).

Almost surely, 2^{1868191712408} is an apocalyptic number.

It is an amenable number.

1868191712408 is an abundant number, since it is smaller than the sum of its proper divisors (2202928249192).

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

1868191712408 is a wasteful number, since it uses less digits than its factorization.

1868191712408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565433399 (or 565433395 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 56.

The spelling of 1868191712408 in words is "one trillion, eight hundred sixty-eight billion, one hundred ninety-one million, seven hundred twelve thousand, four hundred eight".