161217711433 has 16 divisors (see below), whose sum is σ = 172372345920. Its totient is φ = 150333644736.

The previous prime is 161217711427. The next prime is 161217711437. The reversal of 161217711433 is 334117712161.

It is a cyclic number.

It is not a de Polignac number, because 161217711433 - 2⁵ = 161217711401 is a prime.

It is a super-3 number, since 3×161217711433³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161217711392 and 161217711401.

It is not an unprimeable number, because it can be changed into a prime (161217711437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1576035 + ... + 1675207.

It is an arithmetic number, because the mean of its divisors is an integer number (10773271620).

Almost surely, 2^161217711433 is an apocalyptic number.

It is an amenable number.

161217711433 is a deficient number, since it is larger than the sum of its proper divisors (11154634487).

161217711433 is a wasteful number, since it uses less digits than its factorization.

161217711433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100536.

The product of its digits is 21168, while the sum is 37.

The spelling of 161217711433 in words is "one hundred sixty-one billion, two hundred seventeen million, seven hundred eleven thousand, four hundred thirty-three".