1983117680 has 20 divisors (see below), whose sum is σ = 4610748792. Its totient is φ = 793247040.

The previous prime is 1983117673. The next prime is 1983117683. The reversal of 1983117680 is 867113891.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983117683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12394406 + ... + 12394565.

Almost surely, 2^1983117680 is an apocalyptic number.

1983117680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1983117680 is an abundant number, since it is smaller than the sum of its proper divisors (2627631112).

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

1983117680 is a wasteful number, since it uses less digits than its factorization.

1983117680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24788984 (or 24788978 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1983117680 is about 44532.2094668567. The cubic root of 1983117680 is about 1256.3659629758.

The spelling of 1983117680 in words is "one billion, nine hundred eighty-three million, one hundred seventeen thousand, six hundred eighty".