1617217573543 has 64 divisors (see below), whose sum is σ = 2048266483200. Its totient is φ = 1254979215360.

The previous prime is 1617217573541. The next prime is 1617217573547. The reversal of 1617217573543 is 3453757127161.

It is not a de Polignac number, because 1617217573543 - 2¹ = 1617217573541 is a prime.

It is a super-2 number, since 2×1617217573543² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1617217573541) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19197048 + ... + 19281106.

It is an arithmetic number, because the mean of its divisors is an integer number (32004163800).

Almost surely, 2^{1617217573543} is an apocalyptic number.

1617217573543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1617217573543 is a deficient number, since it is larger than the sum of its proper divisors (431048909657).

1617217573543 is a wasteful number, since it uses less digits than its factorization.

1617217573543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84272.

The product of its digits is 3704400, while the sum is 52.

The spelling of 1617217573543 in words is "one trillion, six hundred seventeen billion, two hundred seventeen million, five hundred seventy-three thousand, five hundred forty-three".