161817950 has 24 divisors (see below), whose sum is σ = 343979472. Its totient is φ = 55480320.

The previous prime is 161817947. The next prime is 161817973. The reversal of 161817950 is 59718161.

161817950 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 230819 + ... + 231518.

It is an arithmetic number, because the mean of its divisors is an integer number (14332478).

Almost surely, 2^161817950 is an apocalyptic number.

161817950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161817950 is an abundant number, since it is smaller than the sum of its proper divisors (182161522).

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

161817950 is a wasteful number, since it uses less digits than its factorization.

161817950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462356 (or 462351 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 38.

The square root of 161817950 is about 12720.7684516306. The cubic root of 161817950 is about 544.9318995794.

The spelling of 161817950 in words is "one hundred sixty-one million, eight hundred seventeen thousand, nine hundred fifty".