643294411880 has 32 divisors (see below), whose sum is σ = 1481073184800. Its totient is φ = 251333630016.

The previous prime is 643294411763. The next prime is 643294411897. The reversal of 643294411880 is 88114492346.

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, 187002470 + ... + 187005909.

It is an arithmetic number, because the mean of its divisors is an integer number (46283537025).

Almost surely, 2^643294411880 is an apocalyptic number.

It is an amenable number.

643294411880 is an abundant number, since it is smaller than the sum of its proper divisors (837778772920).

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

643294411880 is a wasteful number, since it uses less digits than its factorization.

643294411880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374008433 (or 374008429 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 50.

The spelling of 643294411880 in words is "six hundred forty-three billion, two hundred ninety-four million, four hundred eleven thousand, eight hundred eighty".