646366264 has 16 divisors (see below), whose sum is σ = 1218219120. Its totient is φ = 321507840.

The previous prime is 646366241. The next prime is 646366289. The reversal of 646366264 is 462663646.

It is a self number, because there is not a number n which added to its sum of digits gives 646366264.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207772 + ... + 210859.

It is an arithmetic number, because the mean of its divisors is an integer number (76138695).

Almost surely, 2^646366264 is an apocalyptic number.

It is an amenable number.

646366264 is a deficient number, since it is larger than the sum of its proper divisors (571852856).

646366264 is a wasteful number, since it uses less digits than its factorization.

646366264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418830 (or 418826 counting only the distinct ones).

The product of its digits is 746496, while the sum is 43.

The square root of 646366264 is about 25423.7342654457. The cubic root of 646366264 is about 864.6218909446.

It can be divided in two parts, 6463 and 66264, that added together give a palindrome (72727).

The spelling of 646366264 in words is "six hundred forty-six million, three hundred sixty-six thousand, two hundred sixty-four".