1681946872955 has 32 divisors (see below), whose sum is σ = 2040395857920. Its totient is φ = 1330921912320.

The previous prime is 1681946872939. The next prime is 1681946872961. The reversal of 1681946872955 is 5592786491861.

It is not a de Polignac number, because 1681946872955 - 2⁴ = 1681946872939 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333783326 + ... + 333788364.

It is an arithmetic number, because the mean of its divisors is an integer number (63762370560).

Almost surely, 2^{1681946872955} is an apocalyptic number.

1681946872955 is a deficient number, since it is larger than the sum of its proper divisors (358448984965).

1681946872955 is a wasteful number, since it uses less digits than its factorization.

1681946872955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659.

The product of its digits is 261273600, while the sum is 71.

The spelling of 1681946872955 in words is "one trillion, six hundred eighty-one billion, nine hundred forty-six million, eight hundred seventy-two thousand, nine hundred fifty-five".