646309334352 has 40 divisors (see below), whose sum is σ = 1821417216480. Its totient is φ = 195851313280.

The previous prime is 646309334291. The next prime is 646309334357. The reversal of 646309334352 is 253433903646.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646309334357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 612034827 + ... + 612035882.

It is an arithmetic number, because the mean of its divisors is an integer number (45535430412).

Almost surely, 2^646309334352 is an apocalyptic number.

It is an amenable number.

646309334352 is an abundant number, since it is smaller than the sum of its proper divisors (1175107882128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646309334352 is a wasteful number, since it uses less digits than its factorization.

646309334352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224070731 (or 1224070725 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 48.

The spelling of 646309334352 in words is "six hundred forty-six billion, three hundred nine million, three hundred thirty-four thousand, three hundred fifty-two".