646534065 has 8 divisors (see below), whose sum is σ = 1034454528. Its totient is φ = 344818160.

The previous prime is 646534051. The next prime is 646534067. The reversal of 646534065 is 560435646.

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

It is not a de Polignac number, because 646534065 - 2¹⁷ = 646402993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646534067) 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, 21551121 + ... + 21551150.

It is an arithmetic number, because the mean of its divisors is an integer number (129306816).

Almost surely, 2^646534065 is an apocalyptic number.

It is an amenable number.

646534065 is a deficient number, since it is larger than the sum of its proper divisors (387920463).

646534065 is a wasteful number, since it uses less digits than its factorization.

646534065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43102279.

The product of its (nonzero) digits is 259200, while the sum is 39.

The square root of 646534065 is about 25427.0341369181. The cubic root of 646534065 is about 864.6967050105.

The spelling of 646534065 in words is "six hundred forty-six million, five hundred thirty-four thousand, sixty-five".