161554195 has 16 divisors (see below), whose sum is σ = 212002560. Its totient is φ = 117208800.

The previous prime is 161554187. The next prime is 161554243. The reversal of 161554195 is 591455161.

It is not a de Polignac number, because 161554195 - 2³ = 161554187 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 20800 + ... + 27490.

It is an arithmetic number, because the mean of its divisors is an integer number (13250160).

Almost surely, 2^161554195 is an apocalyptic number.

161554195 is a deficient number, since it is larger than the sum of its proper divisors (50448365).

161554195 is a wasteful number, since it uses less digits than its factorization.

161554195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7146.

The product of its digits is 27000, while the sum is 37.

The square root of 161554195 is about 12710.3971220415. The cubic root of 161554195 is about 544.6356681786.

The spelling of 161554195 in words is "one hundred sixty-one million, five hundred fifty-four thousand, one hundred ninety-five".