161057745 has 24 divisors (see below), whose sum is σ = 295589736. Its totient is φ = 80844288.

The previous prime is 161057723. The next prime is 161057773. The reversal of 161057745 is 547750161.

161057745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 5531904 + 155525841 = 2352^2 + 12471^2 .

It is not a de Polignac number, because 161057745 - 2⁶ = 161057681 is a prime.

It is a super-3 number, since 3×161057745³ (a number of 26 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104502 + ... + 106031.

It is an arithmetic number, because the mean of its divisors is an integer number (12316239).

Almost surely, 2^161057745 is an apocalyptic number.

161057745 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161057745 is a deficient number, since it is larger than the sum of its proper divisors (134531991).

161057745 is a wasteful number, since it uses less digits than its factorization.

161057745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210561 (or 210558 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 161057745 is about 12690.8528082237. The cubic root of 161057745 is about 544.0772140705.

The spelling of 161057745 in words is "one hundred sixty-one million, fifty-seven thousand, seven hundred forty-five".