161606010564127 has 4 divisors (see below), whose sum is σ = 164255289425896. Its totient is φ = 158956731702360.

The previous prime is 161606010564059. The next prime is 161606010564137. The reversal of 161606010564127 is 721465010606161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161606010564127 is a prime.

It is a super-2 number, since 2×161606010564127² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161606010564137) 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, 1324639430793 + ... + 1324639430914.

It is an arithmetic number, because the mean of its divisors is an integer number (41063822356474).

Almost surely, 2^{161606010564127} is an apocalyptic number.

161606010564127 is a deficient number, since it is larger than the sum of its proper divisors (2649278861769).

161606010564127 is an equidigital number, since it uses as much as digits as its factorization.

161606010564127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2649278861768.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 161606010564127 in words is "one hundred sixty-one trillion, six hundred six billion, ten million, five hundred sixty-four thousand, one hundred twenty-seven".