643102152 has 128 divisors (see below), whose sum is σ = 2051343360. Its totient is φ = 163134720.

The previous prime is 643102147. The next prime is 643102211. The reversal of 643102152 is 251201346.

643102152 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×643102152² = 827160755814062208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 75418 + ... + 83510.

It is an arithmetic number, because the mean of its divisors is an integer number (16026120).

Almost surely, 2^643102152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 643102152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1025671680).

643102152 is an abundant number, since it is smaller than the sum of its proper divisors (1408241208).

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

643102152 is a wasteful number, since it uses less digits than its factorization.

643102152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8163 (or 8159 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 643102152 is about 25359.4588270334. The cubic root of 643102152 is about 863.1640040328.

Adding to 643102152 its reverse (251201346), we get a palindrome (894303498).

The spelling of 643102152 in words is "six hundred forty-three million, one hundred two thousand, one hundred fifty-two".