42042550646656 has 64 divisors (see below), whose sum is σ = 95819258004480. Its totient is φ = 17999905771008.

The previous prime is 42042550646623. The next prime is 42042550646669. The reversal of 42042550646656 is 65664605524024.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 42042550646597 and 42042550646606.

It is a congruent number.

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, 22986216 + ... + 24747751.

It is an arithmetic number, because the mean of its divisors is an integer number (1497175906320).

Almost surely, 2^{42042550646656} is an apocalyptic number.

It is an amenable number.

42042550646656 is an abundant number, since it is smaller than the sum of its proper divisors (53776707357824).

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

42042550646656 is an equidigital number, since it uses as much as digits as its factorization.

42042550646656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47734971 (or 47734959 counting only the distinct ones).

The product of its (nonzero) digits is 41472000, while the sum is 55.

The spelling of 42042550646656 in words is "forty-two trillion, forty-two billion, five hundred fifty million, six hundred forty-six thousand, six hundred fifty-six".