1671768081005 has 16 divisors (see below), whose sum is σ = 2195108192448. Its totient is φ = 1212158112000.

The previous prime is 1671768080989. The next prime is 1671768081007. The reversal of 1671768081005 is 5001808671761.

It is a happy number.

It is not a de Polignac number, because 1671768081005 - 2⁴ = 1671768080989 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 (1671768081007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45896876 + ... + 45933285.

It is an arithmetic number, because the mean of its divisors is an integer number (137194262028).

Almost surely, 2^{1671768081005} is an apocalyptic number.

It is an amenable number.

1671768081005 is a deficient number, since it is larger than the sum of its proper divisors (523340111443).

1671768081005 is a wasteful number, since it uses less digits than its factorization.

1671768081005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91830508.

The product of its (nonzero) digits is 564480, while the sum is 50.

The spelling of 1671768081005 in words is "one trillion, six hundred seventy-one billion, seven hundred sixty-eight million, eighty-one thousand, five".