161560511602 has 24 divisors (see below), whose sum is σ = 298489351644. Its totient is φ = 65167264512.

The previous prime is 161560511591. The next prime is 161560511659. The reversal of 161560511602 is 206115065161.

It can be written as a sum of positive squares in 2 ways, for example, as 161201447001 + 359064601 = 401499^2 + 18949^2 .

It is a super-2 number, since 2×161560511602² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48485883 + ... + 48489214.

Almost surely, 2^161560511602 is an apocalyptic number.

161560511602 is a deficient number, since it is larger than the sum of its proper divisors (136928840042).

161560511602 is a wasteful number, since it uses less digits than its factorization.

161560511602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96975130 (or 96975123 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 34.

Adding to 161560511602 its reverse (206115065161), we get a palindrome (367675576763).

The spelling of 161560511602 in words is "one hundred sixty-one billion, five hundred sixty million, five hundred eleven thousand, six hundred two".