646130142140 has 96 divisors (see below), whose sum is σ = 1658188070784. Its totient is φ = 206434713600.

The previous prime is 646130142139. The next prime is 646130142167. The reversal of 646130142140 is 41241031646.

It is a junction number, because it is equal to n+sod(n) for n = 646130142097 and 646130142106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1103597 + ... + 1584356.

It is an arithmetic number, because the mean of its divisors is an integer number (17272792404).

Almost surely, 2^646130142140 is an apocalyptic number.

It is an amenable number.

646130142140 is an abundant number, since it is smaller than the sum of its proper divisors (1012057928644).

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

646130142140 is a wasteful number, since it uses less digits than its factorization.

646130142140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2688087 (or 2688085 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

Adding to 646130142140 its reverse (41241031646), we get a palindrome (687371173786).

The spelling of 646130142140 in words is "six hundred forty-six billion, one hundred thirty million, one hundred forty-two thousand, one hundred forty".