1643161452 has 24 divisors (see below), whose sum is σ = 4059575856. Its totient is φ = 515501568.

The previous prime is 1643161411. The next prime is 1643161459. The reversal of 1643161452 is 2541613461.

1643161452 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1643161459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4027153 + ... + 4027560.

It is an arithmetic number, because the mean of its divisors is an integer number (169148994).

Almost surely, 2^1643161452 is an apocalyptic number.

1643161452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1643161452 is an abundant number, since it is smaller than the sum of its proper divisors (2416414404).

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

1643161452 is a wasteful number, since it uses less digits than its factorization.

1643161452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8054737 (or 8054735 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 1643161452 is about 40535.9279158625. The cubic root of 1643161452 is about 1180.0309893231.

The spelling of 1643161452 in words is "one billion, six hundred forty-three million, one hundred sixty-one thousand, four hundred fifty-two".