1671945241824 has 144 divisors (see below), whose sum is σ = 5585817195504. Its totient is φ = 467676979200.

The previous prime is 1671945241823. The next prime is 1671945241877. The reversal of 1671945241824 is 4281425491761.

1671945241824 is a `hidden beast` number, since 1 + 6 + 7 + 1 + 9 + 452 + 4 + 182 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671945241823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20257297 + ... + 20339664.

It is an arithmetic number, because the mean of its divisors is an integer number (38790397191).

Almost surely, 2^{1671945241824} is an apocalyptic number.

It is an amenable number.

1671945241824 is an abundant number, since it is smaller than the sum of its proper divisors (3913871953680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1671945241824 is a wasteful number, since it uses less digits than its factorization.

1671945241824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40597001 (or 40596990 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The spelling of 1671945241824 in words is "one trillion, six hundred seventy-one billion, nine hundred forty-five million, two hundred forty-one thousand, eight hundred twenty-four".