643099929360 has 160 divisors (see below), whose sum is σ = 2305862415360. Its totient is φ = 145223222784.

The previous prime is 643099929349. The next prime is 643099929389. The reversal of 643099929360 is 63929990346.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 643099929294 and 643099929303.

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, 2166570 + ... + 2445449.

It is an arithmetic number, because the mean of its divisors is an integer number (14411640096).

Almost surely, 2^643099929360 is an apocalyptic number.

643099929360 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

643099929360 is an abundant number, since it is smaller than the sum of its proper divisors (1662762486000).

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

643099929360 is a wasteful number, since it uses less digits than its factorization.

643099929360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612125 (or 4612119 counting only the distinct ones).

The product of its (nonzero) digits is 17006112, while the sum is 60.

The spelling of 643099929360 in words is "six hundred forty-three billion, ninety-nine million, nine hundred twenty-nine thousand, three hundred sixty".