161156606050561 has 8 divisors (see below), whose sum is σ = 175807534410144. Its totient is φ = 146505732325920.

The previous prime is 161156606050519. The next prime is 161156606050577. The reversal of 161156606050561 is 165050606651161.

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

It is not a de Polignac number, because 161156606050561 - 2¹⁷ = 161156605919489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161156606050061) 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, 7365091 + ... + 19405096.

It is an arithmetic number, because the mean of its divisors is an integer number (21975941801268).

Almost surely, 2^{161156606050561} is an apocalyptic number.

161156606050561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

161156606050561 is a deficient number, since it is larger than the sum of its proper divisors (14650928359583).

161156606050561 is a wasteful number, since it uses less digits than its factorization.

161156606050561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27317471.

The product of its (nonzero) digits is 972000, while the sum is 49.

The spelling of 161156606050561 in words is "one hundred sixty-one trillion, one hundred fifty-six billion, six hundred six million, fifty thousand, five hundred sixty-one".