161560056056041 has 4 divisors (see below), whose sum is σ = 161604772377412. Its totient is φ = 161515339734672.

The previous prime is 161560056055943. The next prime is 161560056056081. The reversal of 161560056056041 is 140650650065161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2891292144400 + 158668763911641 = 1700380^2 + 12596379^2 .

It is a cyclic number.

It is not a de Polignac number, because 161560056056041 - 2⁹ = 161560056055529 is a prime.

It is a super-2 number, since 2×161560056056041² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161560056055982 and 161560056056000.

It is not an unprimeable number, because it can be changed into a prime (161560056056081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22358155266 + ... + 22358162491.

It is an arithmetic number, because the mean of its divisors is an integer number (40401193094353).

Almost surely, 2^{161560056056041} is an apocalyptic number.

It is an amenable number.

161560056056041 is a deficient number, since it is larger than the sum of its proper divisors (44716321371).

161560056056041 is an equidigital number, since it uses as much as digits as its factorization.

161560056056041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44716321370.

The product of its (nonzero) digits is 648000, while the sum is 46.

The spelling of 161560056056041 in words is "one hundred sixty-one trillion, five hundred sixty billion, fifty-six million, fifty-six thousand, forty-one".