161561060115011 has 8 divisors (see below), whose sum is σ = 163094130949824. Its totient is φ = 160028418065320.

The previous prime is 161561060114969. The next prime is 161561060115017. The reversal of 161561060115011 is 110511060165161.

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

It is a cyclic number.

It is not a de Polignac number, because 161561060115011 - 2⁶ = 161561060114947 is a prime.

It is a super-2 number, since 2×161561060115011² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161561060115017) 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, 106439105 + ... + 107946306.

It is an arithmetic number, because the mean of its divisors is an integer number (20386766368728).

Almost surely, 2^{161561060115011} is an apocalyptic number.

161561060115011 is a deficient number, since it is larger than the sum of its proper divisors (1533070834813).

161561060115011 is a wasteful number, since it uses less digits than its factorization.

161561060115011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214392561.

The product of its (nonzero) digits is 5400, while the sum is 35.

The spelling of 161561060115011 in words is "one hundred sixty-one trillion, five hundred sixty-one billion, sixty million, one hundred fifteen thousand, eleven".