161500011101061 has 8 divisors (see below), whose sum is σ = 215333432524320. Its totient is φ = 107666631872592.

The previous prime is 161500011101029. The next prime is 161500011101063. The reversal of 161500011101061 is 160101110005161.

161500011101061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161500011101061 - 2⁵ = 161500011101029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161500011101063) 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, 154855 + ... + 17972868.

It is an arithmetic number, because the mean of its divisors is an integer number (26916679065540).

Almost surely, 2^{161500011101061} is an apocalyptic number.

It is an amenable number.

161500011101061 is a deficient number, since it is larger than the sum of its proper divisors (53833421423259).

161500011101061 is a wasteful number, since it uses less digits than its factorization.

161500011101061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21097395.

The product of its (nonzero) digits is 180, while the sum is 24.

The spelling of 161500011101061 in words is "one hundred sixty-one trillion, five hundred billion, eleven million, one hundred one thousand, sixty-one".