161617343343 has 16 divisors (see below), whose sum is σ = 221089053696. Its totient is φ = 104953440960.

The previous prime is 161617343311. The next prime is 161617343347. The reversal of 161617343343 is 343343716161.

It is a happy number.

It is not a de Polignac number, because 161617343343 - 2⁵ = 161617343311 is a prime.

It is a super-2 number, since 2×161617343343² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161617343295 and 161617343304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161617343347) 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, 942655 + ... + 1100832.

It is an arithmetic number, because the mean of its divisors is an integer number (13818065856).

Almost surely, 2^161617343343 is an apocalyptic number.

161617343343 is a deficient number, since it is larger than the sum of its proper divisors (59471710353).

161617343343 is a wasteful number, since it uses less digits than its factorization.

161617343343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044174.

The product of its digits is 326592, while the sum is 42.

The spelling of 161617343343 in words is "one hundred sixty-one billion, six hundred seventeen million, three hundred forty-three thousand, three hundred forty-three".