1861850999396 has 24 divisors (see below), whose sum is σ = 3405559000704. Its totient is φ = 888968836800.

The previous prime is 1861850999369. The next prime is 1861850999413. The reversal of 1861850999396 is 6939990581681.

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, 16781240 + ... + 16891823.

It is an arithmetic number, because the mean of its divisors is an integer number (141898291696).

Almost surely, 2^{1861850999396} is an apocalyptic number.

It is an amenable number.

1861850999396 is a deficient number, since it is larger than the sum of its proper divisors (1543708001308).

1861850999396 is a wasteful number, since it uses less digits than its factorization.

1861850999396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33673691 (or 33673689 counting only the distinct ones).

The product of its (nonzero) digits is 226748160, while the sum is 74.

The spelling of 1861850999396 in words is "one trillion, eight hundred sixty-one billion, eight hundred fifty million, nine hundred ninety-nine thousand, three hundred ninety-six".