161040577 has 4 divisors (see below), whose sum is σ = 162028720. Its totient is φ = 160052436.

The previous prime is 161040563. The next prime is 161040589. The reversal of 161040577 is 775040161.

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: 775040161 = 7 ⋅110720023.

It is a cyclic number.

It is not a de Polignac number, because 161040577 - 2⁷ = 161040449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161040557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493827 + ... + 494152.

It is an arithmetic number, because the mean of its divisors is an integer number (40507180).

Almost surely, 2^161040577 is an apocalyptic number.

It is an amenable number.

161040577 is a deficient number, since it is larger than the sum of its proper divisors (988143).

161040577 is an equidigital number, since it uses as much as digits as its factorization.

161040577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988142.

The product of its (nonzero) digits is 5880, while the sum is 31.

The square root of 161040577 is about 12690.1763975132. The cubic root of 161040577 is about 544.0578813575.

The spelling of 161040577 in words is "one hundred sixty-one million, forty thousand, five hundred seventy-seven".