641954730 has 64 divisors (see below), whose sum is σ = 1610461440. Its totient is φ = 163559424.

The previous prime is 641954707. The next prime is 641954743. The reversal of 641954730 is 37459146.

641954730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80587 + ... + 88193.

It is an arithmetic number, because the mean of its divisors is an integer number (25163460).

Almost surely, 2^641954730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641954730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (805230720).

641954730 is an abundant number, since it is smaller than the sum of its proper divisors (968506710).

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

641954730 is a wasteful number, since it uses less digits than its factorization.

641954730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7743.

The product of its (nonzero) digits is 90720, while the sum is 39.

The square root of 641954730 is about 25336.8255706985. The cubic root of 641954730 is about 862.6503464017.

The spelling of 641954730 in words is "six hundred forty-one million, nine hundred fifty-four thousand, seven hundred thirty".