161758057 has 4 divisors (see below), whose sum is σ = 168791040. Its totient is φ = 154725076.

The previous prime is 161758049. The next prime is 161758061. The reversal of 161758057 is 750857161.

161758057 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 750857161 = 2521 ⋅297841.

It is a cyclic number.

It is not a de Polignac number, because 161758057 - 2³ = 161758049 is a prime.

It is a super-3 number, since 3×161758057³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161758007) 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, 3516457 + ... + 3516502.

It is an arithmetic number, because the mean of its divisors is an integer number (42197760).

Almost surely, 2^161758057 is an apocalyptic number.

It is an amenable number.

161758057 is a deficient number, since it is larger than the sum of its proper divisors (7032983).

161758057 is an equidigital number, since it uses as much as digits as its factorization.

161758057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7032982.

The product of its (nonzero) digits is 58800, while the sum is 40.

The square root of 161758057 is about 12718.4140913873. The cubic root of 161758057 is about 544.8646601626.

The spelling of 161758057 in words is "one hundred sixty-one million, seven hundred fifty-eight thousand, fifty-seven".