161617331433 has 16 divisors (see below), whose sum is σ = 228908877120. Its totient is φ = 101076627456.

The previous prime is 161617331419. The next prime is 161617331437. The reversal of 161617331433 is 334133716161.

It is not a de Polignac number, because 161617331433 - 2⁴ = 161617331417 is a prime.

It is a super-2 number, since 2×161617331433² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161617331391 and 161617331400.

It is not an unprimeable number, because it can be changed into a prime (161617331437) 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, 5145528 + ... + 5176841.

It is an arithmetic number, because the mean of its divisors is an integer number (14306804820).

Almost surely, 2^161617331433 is an apocalyptic number.

It is an amenable number.

161617331433 is a deficient number, since it is larger than the sum of its proper divisors (67291545687).

161617331433 is a wasteful number, since it uses less digits than its factorization.

161617331433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10322696.

The product of its digits is 81648, while the sum is 39.

The spelling of 161617331433 in words is "one hundred sixty-one billion, six hundred seventeen million, three hundred thirty-one thousand, four hundred thirty-three".