161504090 has 16 divisors (see below), whose sum is σ = 317135520. Its totient is φ = 58728720.

The previous prime is 161504059. The next prime is 161504093. The reversal of 161504090 is 90405161.

It is not an unprimeable number, because it can be changed into a prime (161504093) 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 7 ways as a sum of consecutive naturals, for example, 734000 + ... + 734219.

It is an arithmetic number, because the mean of its divisors is an integer number (19820970).

Almost surely, 2^161504090 is an apocalyptic number.

161504090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161504090 is a deficient number, since it is larger than the sum of its proper divisors (155631430).

161504090 is a wasteful number, since it uses less digits than its factorization.

161504090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468237.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 161504090 is about 12708.4259450177. The cubic root of 161504090 is about 544.5793572674.

The spelling of 161504090 in words is "one hundred sixty-one million, five hundred four thousand, ninety".