161808076 has 6 divisors (see below), whose sum is σ = 283164140. Its totient is φ = 80904036.

The previous prime is 161808061. The next prime is 161808079. The reversal of 161808076 is 670808161.

161808076 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

161808076 is strictly pandigital in base 9.

It is not an unprimeable number, because it can be changed into a prime (161808079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20226006 + ... + 20226013.

Almost surely, 2^161808076 is an apocalyptic number.

It is an amenable number.

161808076 is a deficient number, since it is larger than the sum of its proper divisors (121356064).

161808076 is a wasteful number, since it uses less digits than its factorization.

161808076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40452023 (or 40452021 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 161808076 is about 12720.3803402257. The cubic root of 161808076 is about 544.9208155865.

The spelling of 161808076 in words is "one hundred sixty-one million, eight hundred eight thousand, seventy-six".