641878241472 has 168 divisors, whose sum is σ = 2097903933216. Its totient is φ = 185883254784.

The previous prime is 641878241471. The next prime is 641878241491. The reversal of 641878241472 is 274142878146.

It is a happy number.

641878241472 is a `hidden beast` number, since 6 + 4 + 1 + 87 + 82 + 414 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (641878241471) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2393908 + ... + 2648499.

It is an arithmetic number, because the mean of its divisors is an integer number (12487523412).

Almost surely, 2^641878241472 is an apocalyptic number.

It is an amenable number.

641878241472 is an abundant number, since it is smaller than the sum of its proper divisors (1456025691744).

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

641878241472 is a wasteful number, since it uses less digits than its factorization.

641878241472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5042455 (or 5042442 counting only the distinct ones).

The product of its digits is 4816896, while the sum is 54.

The spelling of 641878241472 in words is "six hundred forty-one billion, eight hundred seventy-eight million, two hundred forty-one thousand, four hundred seventy-two".