641532751 has 16 divisors (see below), whose sum is σ = 696147840. Its totient is φ = 589800960.

The previous prime is 641532733. The next prime is 641532779. The reversal of 641532751 is 157235146.

641532751 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 641532751 - 2⁷ = 641532623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641532251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44071 + ... + 56791.

It is an arithmetic number, because the mean of its divisors is an integer number (43509240).

Almost surely, 2^641532751 is an apocalyptic number.

641532751 is a deficient number, since it is larger than the sum of its proper divisors (54615089).

641532751 is a wasteful number, since it uses less digits than its factorization.

641532751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12834.

The product of its digits is 25200, while the sum is 34.

The square root of 641532751 is about 25328.4968168267. The cubic root of 641532751 is about 862.4612883556.

Adding to 641532751 its reverse (157235146), we get a palindrome (798767897).

The spelling of 641532751 in words is "six hundred forty-one million, five hundred thirty-two thousand, seven hundred fifty-one".