42156622321 has 16 divisors (see below), whose sum is σ = 49361341248. Its totient is φ = 35575718400.

The previous prime is 42156622273. The next prime is 42156622331. The reversal of 42156622321 is 12322665124.

It is a cyclic number.

It is not a de Polignac number, because 42156622321 - 2²¹ = 42154525169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42156622331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530435 + ... + 1557736.

It is an arithmetic number, because the mean of its divisors is an integer number (3085083828).

Almost surely, 2^42156622321 is an apocalyptic number.

It is an amenable number.

42156622321 is a deficient number, since it is larger than the sum of its proper divisors (7204718927).

42156622321 is a wasteful number, since it uses less digits than its factorization.

42156622321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3088272.

The product of its digits is 34560, while the sum is 34.

The spelling of 42156622321 in words is "forty-two billion, one hundred fifty-six million, six hundred twenty-two thousand, three hundred twenty-one".