161606061615995 has 4 divisors (see below), whose sum is σ = 193927273939200. Its totient is φ = 129284849292792.

The previous prime is 161606061615983. The next prime is 161606061615997. The reversal of 161606061615995 is 599516160606161.

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

It is a cyclic number.

It is not a de Polignac number, because 161606061615995 - 2⁶ = 161606061615931 is a prime.

It is a super-2 number, since 2×161606061615995² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161606061615997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16160606161595 + ... + 16160606161604.

It is an arithmetic number, because the mean of its divisors is an integer number (48481818484800).

Almost surely, 2^{161606061615995} is an apocalyptic number.

161606061615995 is a deficient number, since it is larger than the sum of its proper divisors (32321212323205).

161606061615995 is an equidigital number, since it uses as much as digits as its factorization.

161606061615995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32321212323204.

The product of its (nonzero) digits is 15746400, while the sum is 62.

The spelling of 161606061615995 in words is "one hundred sixty-one trillion, six hundred six billion, sixty-one million, six hundred fifteen thousand, nine hundred ninety-five".