161663411 has 16 divisors (see below), whose sum is σ = 200841984. Its totient is φ = 126706464.

The previous prime is 161663407. The next prime is 161663441. The reversal of 161663411 is 114366161.

161663411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 161663411 - 2² = 161663407 is a prime.

It is a super-2 number, since 2×161663411² = 52270116912309842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161663441) 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, 1436 + ... + 18038.

It is an arithmetic number, because the mean of its divisors is an integer number (12552624).

Almost surely, 2^161663411 is an apocalyptic number.

161663411 is a deficient number, since it is larger than the sum of its proper divisors (39178573).

161663411 is a wasteful number, since it uses less digits than its factorization.

161663411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16730.

The product of its digits is 2592, while the sum is 29.

The square root of 161663411 is about 12714.6927214149. The cubic root of 161663411 is about 544.7583711309.

The spelling of 161663411 in words is "one hundred sixty-one million, six hundred sixty-three thousand, four hundred eleven".