1681340815055 has 32 divisors (see below), whose sum is σ = 2330264125440. Its totient is φ = 1151739492480.

The previous prime is 1681340815051. The next prime is 1681340815067. The reversal of 1681340815055 is 5505180431861.

It is not a de Polignac number, because 1681340815055 - 2² = 1681340815051 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1681340815051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4469327 + ... + 4830896.

It is an arithmetic number, because the mean of its divisors is an integer number (72820753920).

Almost surely, 2^{1681340815055} is an apocalyptic number.

1681340815055 is a deficient number, since it is larger than the sum of its proper divisors (648923310385).

1681340815055 is a wasteful number, since it uses less digits than its factorization.

1681340815055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9300431.

The product of its (nonzero) digits is 576000, while the sum is 47.

The spelling of 1681340815055 in words is "one trillion, six hundred eighty-one billion, three hundred forty million, eight hundred fifteen thousand, fifty-five".