161854958 has 16 divisors (see below), whose sum is σ = 256450320. Its totient is φ = 76401216.

The previous prime is 161854883. The next prime is 161854991. The reversal of 161854958 is 859458161.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3866 + ... + 18402.

It is an arithmetic number, because the mean of its divisors is an integer number (16028145).

Almost surely, 2^161854958 is an apocalyptic number.

161854958 is a deficient number, since it is larger than the sum of its proper divisors (94595362).

161854958 is a wasteful number, since it uses less digits than its factorization.

161854958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14851.

The product of its digits is 345600, while the sum is 47.

The square root of 161854958 is about 12722.2229975740. Note that the first 3 decimals coincide. The cubic root of 161854958 is about 544.9734386516.

The spelling of 161854958 in words is "one hundred sixty-one million, eight hundred fifty-four thousand, nine hundred fifty-eight".