161413664611 has 4 divisors (see below), whose sum is σ = 161510495112. Its totient is φ = 161316834112.

The previous prime is 161413664567. The next prime is 161413664639. The reversal of 161413664611 is 116466314161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 116466314161 = 20047 ⋅5809663.

It is a cyclic number.

It is not a de Polignac number, because 161413664611 - 2¹¹ = 161413662563 is a prime.

It is a super-2 number, since 2×161413664611² (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 (161413664311) 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, 48412750 + ... + 48416083.

It is an arithmetic number, because the mean of its divisors is an integer number (40377623778).

Almost surely, 2^161413664611 is an apocalyptic number.

161413664611 is a deficient number, since it is larger than the sum of its proper divisors (96830501).

161413664611 is an equidigital number, since it uses as much as digits as its factorization.

161413664611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96830500.

The product of its digits is 62208, while the sum is 40.

Adding to 161413664611 its reverse (116466314161), we get a palindrome (277879978772).

The spelling of 161413664611 in words is "one hundred sixty-one billion, four hundred thirteen million, six hundred sixty-four thousand, six hundred eleven".