161825854 has 8 divisors (see below), whose sum is σ = 247318920. Its totient is φ = 79386216.

The previous prime is 161825843. The next prime is 161825857. The reversal of 161825854 is 458528161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161825857) 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 3 ways as a sum of consecutive naturals, for example, 763224 + ... + 763435.

It is an arithmetic number, because the mean of its divisors is an integer number (30914865).

Almost surely, 2^161825854 is an apocalyptic number.

161825854 is a deficient number, since it is larger than the sum of its proper divisors (85493066).

161825854 is a wasteful number, since it uses less digits than its factorization.

161825854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526714.

The product of its digits is 76800, while the sum is 40.

The square root of 161825854 is about 12721.0791208922. The cubic root of 161825854 is about 544.9407718370.

It can be divided in two parts, 1618 and 25854, that added together give a palindrome (27472).

The spelling of 161825854 in words is "one hundred sixty-one million, eight hundred twenty-five thousand, eight hundred fifty-four".