161954742 has 8 divisors (see below), whose sum is σ = 323909496. Its totient is φ = 53984912.

The previous prime is 161954731. The next prime is 161954747. The reversal of 161954742 is 247459161.

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

161954742 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 161954742.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161954747) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13496223 + ... + 13496234.

It is an arithmetic number, because the mean of its divisors is an integer number (40488687).

Almost surely, 2^161954742 is an apocalyptic number.

161954742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161954742 is a wasteful number, since it uses less digits than its factorization.

161954742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26992462.

The product of its digits is 60480, while the sum is 39.

The square root of 161954742 is about 12726.1440350170. The cubic root of 161954742 is about 545.0854081562.

The spelling of 161954742 in words is "one hundred sixty-one million, nine hundred fifty-four thousand, seven hundred forty-two".