646303085 has 8 divisors (see below), whose sum is σ = 776007960. Its totient is φ = 516746304.

The previous prime is 646303067. The next prime is 646303121. The reversal of 646303085 is 580303646.

It can be written as a sum of positive squares in 4 ways, for example, as 169885156 + 476417929 = 13034^2 + 21827^2 .

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 646303085 - 2²⁰ = 645254509 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27182 + ... + 45071.

It is an arithmetic number, because the mean of its divisors is an integer number (97000995).

Almost surely, 2^646303085 is an apocalyptic number.

It is an amenable number.

646303085 is a deficient number, since it is larger than the sum of its proper divisors (129704875).

646303085 is a wasteful number, since it uses less digits than its factorization.

646303085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74047.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 646303085 is about 25422.4917150149. The cubic root of 646303085 is about 864.5937192359.

The spelling of 646303085 in words is "six hundred forty-six million, three hundred three thousand, eighty-five".