641212005784 has 32 divisors (see below), whose sum is σ = 1374051974400. Its totient is φ = 274799895840.

The previous prime is 641212005739. The next prime is 641212005793. The reversal of 641212005784 is 487500212146.

It is a super-2 number, since 2×641212005784² (a number of 24 digits) contains 22 as substring.

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, 4793197 + ... + 4925155.

It is an arithmetic number, because the mean of its divisors is an integer number (42939124200).

Almost surely, 2^641212005784 is an apocalyptic number.

It is an amenable number.

641212005784 is an abundant number, since it is smaller than the sum of its proper divisors (732839968616).

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

641212005784 is a wasteful number, since it uses less digits than its factorization.

641212005784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218743 (or 218739 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 641212005784 in words is "six hundred forty-one billion, two hundred twelve million, five thousand, seven hundred eighty-four".