1671781148144 has 20 divisors (see below), whose sum is σ = 3239104250280. Its totient is φ = 835883277120.

The previous prime is 1671781148029. The next prime is 1671781148159. The reversal of 1671781148144 is 4418411871761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1760534 + ... + 2538314.

It is an arithmetic number, because the mean of its divisors is an integer number (161955212514).

Almost surely, 2^{1671781148144} is an apocalyptic number.

It is an amenable number.

1671781148144 is a deficient number, since it is larger than the sum of its proper divisors (1567323102136).

1671781148144 is a wasteful number, since it uses less digits than its factorization.

1671781148144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912128 (or 912122 counting only the distinct ones).

The product of its digits is 1204224, while the sum is 53.

The spelling of 1671781148144 in words is "one trillion, six hundred seventy-one billion, seven hundred eighty-one million, one hundred forty-eight thousand, one hundred forty-four".