643106752872 has 32 divisors (see below), whose sum is σ = 1607845248000. Its totient is φ = 214358468864.

The previous prime is 643106752843. The next prime is 643106753041. The reversal of 643106752872 is 278257601346.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142248 + ... + 1142999.

It is an arithmetic number, because the mean of its divisors is an integer number (50245164000).

Almost surely, 2^643106752872 is an apocalyptic number.

It is an amenable number.

643106752872 is an abundant number, since it is smaller than the sum of its proper divisors (964738495128).

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

643106752872 is a wasteful number, since it uses less digits than its factorization.

643106752872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1306105 (or 1306101 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 643106752872 in words is "six hundred forty-three billion, one hundred six million, seven hundred fifty-two thousand, eight hundred seventy-two".