643480857124 has 48 divisors (see below), whose sum is σ = 1332305694720. Its totient is φ = 266112226080.

The previous prime is 643480857119. The next prime is 643480857137. The reversal of 643480857124 is 421758084346.

It is a super-3 number, since 3×643480857124³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 767014 + ... + 1369405.

It is an arithmetic number, because the mean of its divisors is an integer number (27756368640).

Almost surely, 2^643480857124 is an apocalyptic number.

It is an amenable number.

643480857124 is an abundant number, since it is smaller than the sum of its proper divisors (688824837596).

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

643480857124 is a wasteful number, since it uses less digits than its factorization.

643480857124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136808 (or 2136806 counting only the distinct ones).

The product of its (nonzero) digits is 5160960, while the sum is 52.

The spelling of 643480857124 in words is "six hundred forty-three billion, four hundred eighty million, eight hundred fifty-seven thousand, one hundred twenty-four".