161411730711 has 32 divisors (see below), whose sum is σ = 269502916608. Its totient is φ = 83480838240.

The previous prime is 161411730707. The next prime is 161411730763. The reversal of 161411730711 is 117037114161.

161411730711 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161411730711 - 2² = 161411730707 is a prime.

It is a super-2 number, since 2×161411730711² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161411730811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1486665 + ... + 1591538.

It is an arithmetic number, because the mean of its divisors is an integer number (8421966144).

Almost surely, 2^161411730711 is an apocalyptic number.

161411730711 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

161411730711 is a deficient number, since it is larger than the sum of its proper divisors (108091185897).

161411730711 is a wasteful number, since it uses less digits than its factorization.

161411730711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3078451.

The product of its (nonzero) digits is 3528, while the sum is 33.

Adding to 161411730711 its reverse (117037114161), we get a palindrome (278448844872).

The spelling of 161411730711 in words is "one hundred sixty-one billion, four hundred eleven million, seven hundred thirty thousand, seven hundred eleven".