161602332401 has 16 divisors (see below), whose sum is σ = 171496679760. Its totient is φ = 151751424000.

The previous prime is 161602332391. The next prime is 161602332403. The reversal of 161602332401 is 104233206161.

It can be written as a sum of positive squares in 8 ways, for example, as 34595628001 + 127006704400 = 185999^2 + 356380^2 .

It is a cyclic number.

It is not a de Polignac number, because 161602332401 - 2¹⁴ = 161602316017 is a prime.

It is a super-2 number, since 2×161602332401² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161602332403) 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, 29374151 + ... + 29379651.

It is an arithmetic number, because the mean of its divisors is an integer number (10718542485).

Almost surely, 2^161602332401 is an apocalyptic number.

It is an amenable number.

161602332401 is a deficient number, since it is larger than the sum of its proper divisors (9894347359).

161602332401 is a wasteful number, since it uses less digits than its factorization.

161602332401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 161602332401 its reverse (104233206161), we get a palindrome (265835538562).

The spelling of 161602332401 in words is "one hundred sixty-one billion, six hundred two million, three hundred thirty-two thousand, four hundred one".