641790775 has 6 divisors (see below), whose sum is σ = 795820592. Its totient is φ = 513432600.

The previous prime is 641790739. The next prime is 641790803. The reversal of 641790775 is 577097146.

641790775 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641790775 - 2⁹ = 641790263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12835791 + ... + 12835840.

Almost surely, 2^641790775 is an apocalyptic number.

641790775 is a deficient number, since it is larger than the sum of its proper divisors (154029817).

641790775 is a wasteful number, since it uses less digits than its factorization.

641790775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25671641 (or 25671636 counting only the distinct ones).

The product of its (nonzero) digits is 370440, while the sum is 46.

The square root of 641790775 is about 25333.5898561574. The cubic root of 641790775 is about 862.5768999557.

The spelling of 641790775 in words is "six hundred forty-one million, seven hundred ninety thousand, seven hundred seventy-five".