641200065 has 16 divisors (see below), whose sum is σ = 1119185856. Its totient is φ = 310884800.

The previous prime is 641200061. The next prime is 641200073. The reversal of 641200065 is 560002146.

It is not a de Polignac number, because 641200065 - 2² = 641200061 is a prime.

It is a super-2 number, since 2×641200065² = 822275046712008450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641200061) 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, 1942866 + ... + 1943195.

It is an arithmetic number, because the mean of its divisors is an integer number (69949116).

Almost surely, 2^641200065 is an apocalyptic number.

It is an amenable number.

641200065 is a deficient number, since it is larger than the sum of its proper divisors (477985791).

641200065 is a wasteful number, since it uses less digits than its factorization.

641200065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886080.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 641200065 is about 25321.9285402988. The cubic root of 641200065 is about 862.3121775433.

The spelling of 641200065 in words is "six hundred forty-one million, two hundred thousand, sixty-five".