641548968 has 32 divisors (see below), whose sum is σ = 1655612160. Its totient is φ = 206951040.

The previous prime is 641548961. The next prime is 641548997. The reversal of 641548968 is 869845146.

It is a self number, because there is not a number n which added to its sum of digits gives 641548968.

It is not an unprimeable number, because it can be changed into a prime (641548961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430405 + ... + 431892.

It is an arithmetic number, because the mean of its divisors is an integer number (51737880).

Almost surely, 2^641548968 is an apocalyptic number.

It is an amenable number.

641548968 is an abundant number, since it is smaller than the sum of its proper divisors (1014063192).

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

641548968 is a wasteful number, since it uses less digits than its factorization.

641548968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862337 (or 862333 counting only the distinct ones).

The product of its digits is 1658880, while the sum is 51.

The square root of 641548968 is about 25328.8169482903. The cubic root of 641548968 is about 862.4685555434.

The spelling of 641548968 in words is "six hundred forty-one million, five hundred forty-eight thousand, nine hundred sixty-eight".