1680351181837 has 4 divisors (see below), whose sum is σ = 1687381940160. Its totient is φ = 1673320423516.

The previous prime is 1680351181781. The next prime is 1680351181841. The reversal of 1680351181837 is 7381811530861.

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 1680351181837 - 2²³ = 1680342793229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680351181877) 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, 3515378803 + ... + 3515379280.

It is an arithmetic number, because the mean of its divisors is an integer number (421845485040).

Almost surely, 2^{1680351181837} is an apocalyptic number.

It is an amenable number.

1680351181837 is a deficient number, since it is larger than the sum of its proper divisors (7030758323).

1680351181837 is an equidigital number, since it uses as much as digits as its factorization.

1680351181837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7030758322.

The product of its (nonzero) digits is 967680, while the sum is 52.

The spelling of 1680351181837 in words is "one trillion, six hundred eighty billion, three hundred fifty-one million, one hundred eighty-one thousand, eight hundred thirty-seven".