161500411607 has 4 divisors (see below), whose sum is σ = 166710102336. Its totient is φ = 156290720880.

The previous prime is 161500411571. The next prime is 161500411691. The reversal of 161500411607 is 706114005161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 706114005161 = 57287 ⋅12325903.

It is a cyclic number.

It is not a de Polignac number, because 161500411607 - 2¹⁴ = 161500395223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161500417607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2604845318 + ... + 2604845379.

It is an arithmetic number, because the mean of its divisors is an integer number (41677525584).

Almost surely, 2^161500411607 is an apocalyptic number.

161500411607 is a deficient number, since it is larger than the sum of its proper divisors (5209690729).

161500411607 is an equidigital number, since it uses as much as digits as its factorization.

161500411607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5209690728.

The product of its (nonzero) digits is 5040, while the sum is 32.

Adding to 161500411607 its reverse (706114005161), we get a palindrome (867614416768).

The spelling of 161500411607 in words is "one hundred sixty-one billion, five hundred million, four hundred eleven thousand, six hundred seven".