161562105611 has 8 divisors (see below), whose sum is σ = 163515983904. Its totient is φ = 159617422720.

The previous prime is 161562105599. The next prime is 161562105629. The reversal of 161562105611 is 116501265161.

It is a happy number.

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 161562105611 - 2³⁰ = 160488363787 is a prime.

It is a super-2 number, since 2×161562105611² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161562104611) 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, 2263496 + ... + 2333781.

It is an arithmetic number, because the mean of its divisors is an integer number (20439497988).

Almost surely, 2^161562105611 is an apocalyptic number.

161562105611 is a deficient number, since it is larger than the sum of its proper divisors (1953878293).

161562105611 is a wasteful number, since it uses less digits than its factorization.

161562105611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4597701.

The product of its (nonzero) digits is 10800, while the sum is 35.

The spelling of 161562105611 in words is "one hundred sixty-one billion, five hundred sixty-two million, one hundred five thousand, six hundred eleven".