42640543516220 has 144 divisors (see below), whose sum is σ = 105441576242688. Its totient is φ = 14417582100480.

The previous prime is 42640543516217. The next prime is 42640543516397. The reversal of 42640543516220 is 2261534504624.

It is a happy number.

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 47 ways as a sum of consecutive naturals, for example, 7902236 + ... + 12154275.

It is an arithmetic number, because the mean of its divisors is an integer number (732233168352).

Almost surely, 2^{42640543516220} is an apocalyptic number.

It is an amenable number.

42640543516220 is an abundant number, since it is smaller than the sum of its proper divisors (62801032726468).

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

42640543516220 is a wasteful number, since it uses less digits than its factorization.

42640543516220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20056600 (or 20056585 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 44.

The spelling of 42640543516220 in words is "forty-two trillion, six hundred forty billion, five hundred forty-three million, five hundred sixteen thousand, two hundred twenty".