646534085 has 8 divisors (see below), whose sum is σ = 779740800. Its totient is φ = 514627344.

The previous prime is 646534079. The next prime is 646534087. The reversal of 646534085 is 580435646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 646534085 - 2⁴ = 646534069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646534087) 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, 323897 + ... + 325886.

It is an arithmetic number, because the mean of its divisors is an integer number (97467600).

Almost surely, 2^646534085 is an apocalyptic number.

It is an amenable number.

646534085 is a deficient number, since it is larger than the sum of its proper divisors (133206715).

646534085 is a wasteful number, since it uses less digits than its factorization.

646534085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649987.

The product of its (nonzero) digits is 345600, while the sum is 41.

The square root of 646534085 is about 25427.0345302003. The cubic root of 646534085 is about 864.6967139267.

The spelling of 646534085 in words is "six hundred forty-six million, five hundred thirty-four thousand, eighty-five".