646318824011 has 16 divisors (see below), whose sum is σ = 744584459520. Its totient is φ = 549540145440.

The previous prime is 646318823993. The next prime is 646318824131. The reversal of 646318824011 is 110428813646.

It is a cyclic number.

It is not a de Polignac number, because 646318824011 - 2²² = 646314629707 is a prime.

It is a super-3 number, since 3×646318824011³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646318824211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2189465 + ... + 2467061.

It is an arithmetic number, because the mean of its divisors is an integer number (46536528720).

Almost surely, 2^646318824011 is an apocalyptic number.

646318824011 is a deficient number, since it is larger than the sum of its proper divisors (98265635509).

646318824011 is a wasteful number, since it uses less digits than its factorization.

646318824011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280274.

The product of its (nonzero) digits is 221184, while the sum is 44.

The spelling of 646318824011 in words is "six hundred forty-six billion, three hundred eighteen million, eight hundred twenty-four thousand, eleven".