1993491045680 has 40 divisors (see below), whose sum is σ = 4635183463200. Its totient is φ = 797341918208.

The previous prime is 1993491045673. The next prime is 1993491045719. The reversal of 1993491045680 is 865401943991.

It is a tau number, because it is divible by the number of its divisors (40).

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, 336536 + ... + 2024904.

It is an arithmetic number, because the mean of its divisors is an integer number (115879586580).

Almost surely, 2^{1993491045680} is an apocalyptic number.

1993491045680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1993491045680 is an abundant number, since it is smaller than the sum of its proper divisors (2641692417520).

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

1993491045680 is a wasteful number, since it uses less digits than its factorization.

1993491045680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1703141 (or 1703135 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 59.

The spelling of 1993491045680 in words is "one trillion, nine hundred ninety-three billion, four hundred ninety-one million, forty-five thousand, six hundred eighty".