42021746517 has 8 divisors (see below), whose sum is σ = 57331995424. Its totient is φ = 27362997648.

The previous prime is 42021746509. The next prime is 42021746539. The reversal of 42021746517 is 71564712024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42021746517 - 2³ = 42021746509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42021766517) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 162874858 + ... + 162875115.

It is an arithmetic number, because the mean of its divisors is an integer number (7166499428).

Almost surely, 2^42021746517 is an apocalyptic number.

It is an amenable number.

42021746517 is a deficient number, since it is larger than the sum of its proper divisors (15310248907).

42021746517 is a wasteful number, since it uses less digits than its factorization.

42021746517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325750019.

The product of its (nonzero) digits is 94080, while the sum is 39.

The spelling of 42021746517 in words is "forty-two billion, twenty-one million, seven hundred forty-six thousand, five hundred seventeen".