1681555334195 has 16 divisors (see below), whose sum is σ = 2212370668800. Its totient is φ = 1216803852000.

The previous prime is 1681555334183. The next prime is 1681555334219. The reversal of 1681555334195 is 5914335551861.

It is not a de Polignac number, because 1681555334195 - 2¹² = 1681555330099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1681555334195.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76807481 + ... + 76829370.

It is an arithmetic number, because the mean of its divisors is an integer number (138273166800).

Almost surely, 2^{1681555334195} is an apocalyptic number.

1681555334195 is a deficient number, since it is larger than the sum of its proper divisors (530815334605).

1681555334195 is a wasteful number, since it uses less digits than its factorization.

1681555334195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153637066.

The product of its digits is 9720000, while the sum is 56.

The spelling of 1681555334195 in words is "one trillion, six hundred eighty-one billion, five hundred fifty-five million, three hundred thirty-four thousand, one hundred ninety-five".