643155234302260 has 24 divisors (see below), whose sum is σ = 1409348861254656. Its totient is φ = 246076785298080.

The previous prime is 643155234302213. The next prime is 643155234302351. The reversal of 643155234302260 is 62203432551346.

It is a super-2 number, since 2×643155234302260² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 643155234302260.

It is a congruent 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, 699081775956 + ... + 699081776875.

It is an arithmetic number, because the mean of its divisors is an integer number (58722869218944).

Almost surely, 2^{643155234302260} is an apocalyptic number.

It is an amenable number.

643155234302260 is an abundant number, since it is smaller than the sum of its proper divisors (766193626952396).

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

643155234302260 is a wasteful number, since it uses less digits than its factorization.

643155234302260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398163552863 (or 1398163552861 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 46.

The spelling of 643155234302260 in words is "six hundred forty-three trillion, one hundred fifty-five billion, two hundred thirty-four million, three hundred two thousand, two hundred sixty".