646332556411 has 4 divisors (see below), whose sum is σ = 680350059400. Its totient is φ = 612315053424.

The previous prime is 646332556409. The next prime is 646332556417. The reversal of 646332556411 is 114655233646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 646332556411 - 2¹ = 646332556409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646332556417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17008751466 + ... + 17008751503.

It is an arithmetic number, because the mean of its divisors is an integer number (170087514850).

Almost surely, 2^646332556411 is an apocalyptic number.

646332556411 is a deficient number, since it is larger than the sum of its proper divisors (34017502989).

646332556411 is a wasteful number, since it uses less digits than its factorization.

646332556411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34017502988.

The product of its digits is 1555200, while the sum is 46.

The spelling of 646332556411 in words is "six hundred forty-six billion, three hundred thirty-two million, five hundred fifty-six thousand, four hundred eleven".