646165230 has 16 divisors (see below), whose sum is σ = 1550796624. Its totient is φ = 172310720.

The previous prime is 646165213. The next prime is 646165231. The reversal of 646165230 is 32561646.

It is a junction number, because it is equal to n+sod(n) for n = 646165191 and 646165200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646165231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10769391 + ... + 10769450.

It is an arithmetic number, because the mean of its divisors is an integer number (96924789).

Almost surely, 2^646165230 is an apocalyptic number.

646165230 is an abundant number, since it is smaller than the sum of its proper divisors (904631394).

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

646165230 is a wasteful number, since it uses less digits than its factorization.

646165230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21538851.

The product of its (nonzero) digits is 25920, while the sum is 33.

The square root of 646165230 is about 25419.7802901599. The cubic root of 646165230 is about 864.5322428970.

The spelling of 646165230 in words is "six hundred forty-six million, one hundred sixty-five thousand, two hundred thirty".