1643314144 has 24 divisors (see below), whose sum is σ = 3310516440. Its totient is φ = 802548096.

The previous prime is 1643314117. The next prime is 1643314181. The reversal of 1643314144 is 4414133461.

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, 595759 + ... + 598510.

It is an arithmetic number, because the mean of its divisors is an integer number (137938185).

Almost surely, 2^1643314144 is an apocalyptic number.

It is an amenable number.

1643314144 is an abundant number, since it is smaller than the sum of its proper divisors (1667202296).

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

1643314144 is a wasteful number, since it uses less digits than its factorization.

1643314144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1194322 (or 1194314 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 1643314144 is about 40537.8112877348. The cubic root of 1643314144 is about 1180.0675399434.

The spelling of 1643314144 in words is "one billion, six hundred forty-three million, three hundred fourteen thousand, one hundred forty-four".