646640062242 has 8 divisors (see below), whose sum is σ = 1293280124496. Its totient is φ = 215546687412.

The previous prime is 646640062241. The next prime is 646640062267. The reversal of 646640062242 is 242260046646.

It is a sphenic number, since it is the product of 3 distinct primes.

646640062242 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 646640062194 and 646640062203.

It is not an unprimeable number, because it can be changed into a prime (646640062241) 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 3 ways as a sum of consecutive naturals, for example, 53886671848 + ... + 53886671859.

It is an arithmetic number, because the mean of its divisors is an integer number (161660015562).

Almost surely, 2^646640062242 is an apocalyptic number.

646640062242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

646640062242 is a wasteful number, since it uses less digits than its factorization.

646640062242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107773343712.

The product of its (nonzero) digits is 663552, while the sum is 42.

The spelling of 646640062242 in words is "six hundred forty-six billion, six hundred forty million, sixty-two thousand, two hundred forty-two".