161493758 has 8 divisors (see below), whose sum is σ = 242464752. Its totient is φ = 80672176.

The previous prime is 161493751. The next prime is 161493763. The reversal of 161493758 is 857394161.

161493758 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (161493751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34610 + ... + 38997.

It is an arithmetic number, because the mean of its divisors is an integer number (30308094).

Almost surely, 2^161493758 is an apocalyptic number.

161493758 is a deficient number, since it is larger than the sum of its proper divisors (80970994).

161493758 is a wasteful number, since it uses less digits than its factorization.

161493758 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74706.

The product of its digits is 181440, while the sum is 44.

The square root of 161493758 is about 12708.0194365605. The cubic root of 161493758 is about 544.5677441169.

The spelling of 161493758 in words is "one hundred sixty-one million, four hundred ninety-three thousand, seven hundred fifty-eight".