641288754 has 72 divisors (see below), whose sum is σ = 1451797776. Its totient is φ = 204562800.

The previous prime is 641288743. The next prime is 641288797. The reversal of 641288754 is 457882146.

It is a super-2 number, since 2×641288754² = 822502532013745032, which contains 22 as substring.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 2265897 + ... + 2266179.

It is an arithmetic number, because the mean of its divisors is an integer number (20163858).

Almost surely, 2^641288754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 641288754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (725898888).

641288754 is an abundant number, since it is smaller than the sum of its proper divisors (810509022).

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

641288754 is a wasteful number, since it uses less digits than its factorization.

641288754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484 (or 450 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 641288754 is about 25323.6797089207. The cubic root of 641288754 is about 862.3519332467.

The spelling of 641288754 in words is "six hundred forty-one million, two hundred eighty-eight thousand, seven hundred fifty-four".