161540150 has 48 divisors (see below), whose sum is σ = 319332240. Its totient is φ = 60681600.

The previous prime is 161540129. The next prime is 161540189. The reversal of 161540150 is 51045161.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52145 + ... + 55155.

It is an arithmetic number, because the mean of its divisors is an integer number (6652755).

Almost surely, 2^161540150 is an apocalyptic number.

161540150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161540150 is a deficient number, since it is larger than the sum of its proper divisors (157792090).

161540150 is a wasteful number, since it uses less digits than its factorization.

161540150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3089 (or 3084 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 161540150 is about 12709.8446095930. The cubic root of 161540150 is about 544.6198847658.

The spelling of 161540150 in words is "one hundred sixty-one million, five hundred forty thousand, one hundred fifty".