1643570952 has 16 divisors (see below), whose sum is σ = 4108927440. Its totient is φ = 547856976.

The previous prime is 1643570947. The next prime is 1643570953. The reversal of 1643570952 is 2590753461.

1643570952 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 (1643570953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34241038 + ... + 34241085.

It is an arithmetic number, because the mean of its divisors is an integer number (256807965).

Almost surely, 2^1643570952 is an apocalyptic number.

1643570952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1643570952 is an abundant number, since it is smaller than the sum of its proper divisors (2465356488).

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

1643570952 is a wasteful number, since it uses less digits than its factorization.

1643570952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68482132 (or 68482128 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 42.

The square root of 1643570952 is about 40540.9786759027. The cubic root of 1643570952 is about 1180.1290082067.

The spelling of 1643570952 in words is "one billion, six hundred forty-three million, five hundred seventy thousand, nine hundred fifty-two".