641165330 has 32 divisors (see below), whose sum is σ = 1244699568. Its totient is φ = 236390400.

The previous prime is 641165309. The next prime is 641165381. The reversal of 641165330 is 33561146.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 112763161 + 528402169 = 10619^2 + 22987^2 .

It is a super-2 number, since 2×641165330² = 822185960788017800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 641165293 and 641165302.

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 15 ways as a sum of consecutive naturals, for example, 95690 + ... + 102170.

Almost surely, 2^641165330 is an apocalyptic number.

641165330 is a deficient number, since it is larger than the sum of its proper divisors (603534238).

641165330 is a wasteful number, since it uses less digits than its factorization.

641165330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7262.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 641165330 is about 25321.2426630290. The cubic root of 641165330 is about 862.2966062440.

The spelling of 641165330 in words is "six hundred forty-one million, one hundred sixty-five thousand, three hundred thirty".