641600265 has 16 divisors (see below), whose sum is σ = 1080590400. Its totient is φ = 324176832.

The previous prime is 641600237. The next prime is 641600299. The reversal of 641600265 is 562006146.

It is not a de Polignac number, because 641600265 - 2⁷ = 641600137 is a prime.

It is a Curzon number.

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, 1125330 + ... + 1125899.

It is an arithmetic number, because the mean of its divisors is an integer number (67536900).

Almost surely, 2^641600265 is an apocalyptic number.

It is an amenable number.

641600265 is a deficient number, since it is larger than the sum of its proper divisors (438990135).

641600265 is a wasteful number, since it uses less digits than its factorization.

641600265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251256.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 641600265 is about 25329.8295493673. The cubic root of 641600265 is about 862.4915420301.

The spelling of 641600265 in words is "six hundred forty-one million, six hundred thousand, two hundred sixty-five".