161877411 has 18 divisors (see below), whose sum is σ = 236178852. Its totient is φ = 106841640.

The previous prime is 161877409. The next prime is 161877431. The reversal of 161877411 is 114778161.

161877411 is a `hidden beast` number, since 161 + 87 + 7 + 411 = 666.

It is not a de Polignac number, because 161877411 - 2¹ = 161877409 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (161877431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 102256 + ... + 103826.

Almost surely, 2^161877411 is an apocalyptic number.

161877411 is a deficient number, since it is larger than the sum of its proper divisors (74301441).

161877411 is a wasteful number, since it uses less digits than its factorization.

161877411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1681 counting only the distinct ones).

The product of its digits is 9408, while the sum is 36.

The square root of 161877411 is about 12723.1053992333. The cubic root of 161877411 is about 544.9986375972.

The spelling of 161877411 in words is "one hundred sixty-one million, eight hundred seventy-seven thousand, four hundred eleven".