1680695973893 has 4 divisors (see below), whose sum is σ = 1680701782368. Its totient is φ = 1680690165420.

The previous prime is 1680695973841. The next prime is 1680695973911. The reversal of 1680695973893 is 3983795960861.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1680695973893 - 2³⁰ = 1679622232069 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1680695973893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680695973293) 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, 2446121 + ... + 3056942.

It is an arithmetic number, because the mean of its divisors is an integer number (420175445592).

Almost surely, 2^{1680695973893} is an apocalyptic number.

It is an amenable number.

1680695973893 is a deficient number, since it is larger than the sum of its proper divisors (5808475).

1680695973893 is an equidigital number, since it uses as much as digits as its factorization.

1680695973893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5808474.

The product of its (nonzero) digits is 529079040, while the sum is 74.

The spelling of 1680695973893 in words is "one trillion, six hundred eighty billion, six hundred ninety-five million, nine hundred seventy-three thousand, eight hundred ninety-three".