1984360086840 has 32 divisors (see below), whose sum is σ = 5953080260880. Its totient is φ = 529162689792.

The previous prime is 1984360086823. The next prime is 1984360086853. The reversal of 1984360086840 is 486800634891.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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, 8268166909 + ... + 8268167148.

Almost surely, 2^{1984360086840} is an apocalyptic number.

1984360086840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1984360086840 is an abundant number, since it is smaller than the sum of its proper divisors (3968720174040).

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

1984360086840 is a wasteful number, since it uses less digits than its factorization.

1984360086840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16536334071 (or 16536334067 counting only the distinct ones).

The product of its (nonzero) digits is 7962624, while the sum is 57.

The spelling of 1984360086840 in words is "one trillion, nine hundred eighty-four billion, three hundred sixty million, eighty-six thousand, eight hundred forty".