646231132646 has 64 divisors (see below), whose sum is σ = 1131340115520. Its totient is φ = 273584640000.

The previous prime is 646231132627. The next prime is 646231132661.

646231132646 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×646231132646² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 646231132597 and 646231132606.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 109881626 + ... + 109887506.

It is an arithmetic number, because the mean of its divisors is an integer number (17677189305).

Almost surely, 2^646231132646 is an apocalyptic number.

646231132646 is a deficient number, since it is larger than the sum of its proper divisors (485108982874).

646231132646 is a wasteful number, since it uses less digits than its factorization.

646231132646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8921.

The product of its digits is 746496, while the sum is 44.

It can be divided in two parts, 646231 and 132646, that added together give a palindrome (778877).

The spelling of 646231132646 in words is "six hundred forty-six billion, two hundred thirty-one million, one hundred thirty-two thousand, six hundred forty-six".