1684650591997 has 16 divisors (see below), whose sum is σ = 1738640492992. Its totient is φ = 1631124552960.

The previous prime is 1684650591991. The next prime is 1684650592007. The reversal of 1684650591997 is 7991950564861.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1684650591997 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 (1684650591991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6392122 + ... + 6650452.

It is an arithmetic number, because the mean of its divisors is an integer number (108665030812).

Almost surely, 2^{1684650591997} is an apocalyptic number.

It is an amenable number.

1684650591997 is a deficient number, since it is larger than the sum of its proper divisors (53989900995).

1684650591997 is a wasteful number, since it uses less digits than its factorization.

1684650591997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259228.

The product of its (nonzero) digits is 146966400, while the sum is 70.

The spelling of 1684650591997 in words is "one trillion, six hundred eighty-four billion, six hundred fifty million, five hundred ninety-one thousand, nine hundred ninety-seven".