161758056 has 32 divisors (see below), whose sum is σ = 418341600. Its totient is φ = 52059840.

The previous prime is 161758049. The next prime is 161758061. The reversal of 161758056 is 650857161.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 115510 + ... + 116901.

It is an arithmetic number, because the mean of its divisors is an integer number (13073175).

Almost surely, 2^161758056 is an apocalyptic number.

It is an amenable number.

161758056 is an abundant number, since it is smaller than the sum of its proper divisors (256583544).

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

161758056 is a wasteful number, since it uses less digits than its factorization.

161758056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232449 (or 232445 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 161758056 is about 12718.4140520743. The cubic root of 161758056 is about 544.8646590398.

The spelling of 161758056 in words is "one hundred sixty-one million, seven hundred fifty-eight thousand, fifty-six".