161177984 has 32 divisors (see below), whose sum is σ = 350290440. Its totient is φ = 73262080.

The previous prime is 161177981. The next prime is 161177999. The reversal of 161177984 is 489771161.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161177981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55829 + ... + 58644.

Almost surely, 2^161177984 is an apocalyptic number.

It is an amenable number.

161177984 is an abundant number, since it is smaller than the sum of its proper divisors (189112456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161177984 is a wasteful number, since it uses less digits than its factorization.

161177984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114498 (or 114486 counting only the distinct ones).

The product of its digits is 84672, while the sum is 44.

The square root of 161177984 is about 12695.5891552933. The cubic root of 161177984 is about 544.2125755152.

The spelling of 161177984 in words is "one hundred sixty-one million, one hundred seventy-seven thousand, nine hundred eighty-four".