646146133252 has 24 divisors (see below), whose sum is σ = 1135618900416. Its totient is φ = 321684811488.

The previous prime is 646146133247. The next prime is 646146133277. The reversal of 646146133252 is 252331641646.

It is a happy number.

It is a super-2 number, since 2×646146133252² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646146133199 and 646146133208.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1980898 + ... + 2283910.

It is an arithmetic number, because the mean of its divisors is an integer number (47317454184).

Almost surely, 2^646146133252 is an apocalyptic number.

It is an amenable number.

646146133252 is a deficient number, since it is larger than the sum of its proper divisors (489472767164).

646146133252 is a wasteful number, since it uses less digits than its factorization.

646146133252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305307 (or 305305 counting only the distinct ones).

The product of its digits is 622080, while the sum is 43.

Adding to 646146133252 its reverse (252331641646), we get a palindrome (898477774898).

The spelling of 646146133252 in words is "six hundred forty-six billion, one hundred forty-six million, one hundred thirty-three thousand, two hundred fifty-two".