646273011 has 16 divisors (see below), whose sum is σ = 908893440. Its totient is φ = 407342880.

The previous prime is 646272967. The next prime is 646273013. The reversal of 646273011 is 110372646.

It is not a de Polignac number, because 646273011 - 2⁶ = 646272947 is a prime.

It is a super-2 number, since 2×646273011² = 835337609494012242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 646273011.

It is not an unprimeable number, because it can be changed into a prime (646273013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17401 + ... + 39941.

It is an arithmetic number, because the mean of its divisors is an integer number (56805840).

Almost surely, 2^646273011 is an apocalyptic number.

646273011 is a deficient number, since it is larger than the sum of its proper divisors (262620429).

646273011 is a wasteful number, since it uses less digits than its factorization.

646273011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23066.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 646273011 is about 25421.9002240194. The cubic root of 646273011 is about 864.5803085026.

The spelling of 646273011 in words is "six hundred forty-six million, two hundred seventy-three thousand, eleven".