161041761 has 12 divisors (see below), whose sum is σ = 233322960. Its totient is φ = 107034840.

The previous prime is 161041759. The next prime is 161041781. The reversal of 161041761 is 167140161.

161041761 is a `hidden beast` number, since 1 + 610 + 41 + 7 + 6 + 1 = 666.

It is not a de Polignac number, because 161041761 - 2¹ = 161041759 is a prime.

It is a super-2 number, since 2×161041761² = 51868897571962242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161041711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24051 + ... + 30008.

It is an arithmetic number, because the mean of its divisors is an integer number (19443580).

Almost surely, 2^161041761 is an apocalyptic number.

It is an amenable number.

161041761 is a deficient number, since it is larger than the sum of its proper divisors (72281199).

161041761 is a wasteful number, since it uses less digits than its factorization.

161041761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54396 (or 54393 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 161041761 is about 12690.2230476852. The cubic root of 161041761 is about 544.0592146921.

The spelling of 161041761 in words is "one hundred sixty-one million, forty-one thousand, seven hundred sixty-one".