161505565607118 has 32 divisors (see below), whose sum is σ = 343045054298880. Its totient is φ = 50515335953280.

The previous prime is 161505565607117. The next prime is 161505565607143. The reversal of 161505565607118 is 811706565505161.

161505565607118 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161505565607117) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2391790858 + ... + 2391858381.

It is an arithmetic number, because the mean of its divisors is an integer number (10720157946840).

Almost surely, 2^{161505565607118} is an apocalyptic number.

161505565607118 is an abundant number, since it is smaller than the sum of its proper divisors (181539488691762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161505565607118 is a wasteful number, since it uses less digits than its factorization.

161505565607118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4783649592.

The product of its (nonzero) digits is 7560000, while the sum is 57.

The spelling of 161505565607118 in words is "one hundred sixty-one trillion, five hundred five billion, five hundred sixty-five million, six hundred seven thousand, one hundred eighteen".