161324577 has 24 divisors (see below), whose sum is σ = 247314600. Its totient is φ = 100984320.

The previous prime is 161324561. The next prime is 161324591. The reversal of 161324577 is 775423161.

It is a happy number.

161324577 is a `hidden beast` number, since 1 + 61 + 3 + 24 + 577 = 666.

161324577 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 59536656 + 101787921 = 7716^2 + 10089^2 .

It is not a de Polignac number, because 161324577 - 2⁴ = 161324561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (161323577) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81799 + ... + 83747.

It is an arithmetic number, because the mean of its divisors is an integer number (10304775).

Almost surely, 2^161324577 is an apocalyptic number.

161324577 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

161324577 is a deficient number, since it is larger than the sum of its proper divisors (85990023).

161324577 is a wasteful number, since it uses less digits than its factorization.

161324577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2513 (or 2510 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The square root of 161324577 is about 12701.3612262623. The cubic root of 161324577 is about 544.3775144605.

The spelling of 161324577 in words is "one hundred sixty-one million, three hundred twenty-four thousand, five hundred seventy-seven".