646246216142 has 8 divisors (see below), whose sum is σ = 969713202600. Its totient is φ = 323008481944.

The previous prime is 646246216139. The next prime is 646246216159. The reversal of 646246216142 is 241612642646.

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

It is a junction number, because it is equal to n+sod(n) for n = 646246216093 and 646246216102.

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, 57306017 + ... + 57317292.

It is an arithmetic number, because the mean of its divisors is an integer number (121214150325).

Almost surely, 2^646246216142 is an apocalyptic number.

646246216142 is a deficient number, since it is larger than the sum of its proper divisors (323466986458).

646246216142 is a wasteful number, since it uses less digits than its factorization.

646246216142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114626130.

The product of its digits is 663552, while the sum is 44.

Adding to 646246216142 its reverse (241612642646), we get a palindrome (887858858788).

The spelling of 646246216142 in words is "six hundred forty-six billion, two hundred forty-six million, two hundred sixteen thousand, one hundred forty-two".