161566560005601 has 8 divisors (see below), whose sum is σ = 217642926193504. Its totient is φ = 106600616910720.

The previous prime is 161566560005549. The next prime is 161566560005659. The reversal of 161566560005601 is 106500065665161.

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

It is not a de Polignac number, because 161566560005601 - 2¹⁴ = 161566559989217 is a prime.

It is a super-2 number, since 2×161566560005601² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161566560003601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277605772915 + ... + 277605773496.

It is an arithmetic number, because the mean of its divisors is an integer number (27205365774188).

Almost surely, 2^{161566560005601} is an apocalyptic number.

It is an amenable number.

161566560005601 is a deficient number, since it is larger than the sum of its proper divisors (56076366187903).

161566560005601 is an equidigital number, since it uses as much as digits as its factorization.

161566560005601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555211546511.

The product of its (nonzero) digits is 972000, while the sum is 48.

The spelling of 161566560005601 in words is "one hundred sixty-one trillion, five hundred sixty-six billion, five hundred sixty million, five thousand, six hundred one".