161006481 has 8 divisors (see below), whose sum is σ = 238528160. Its totient is φ = 107337636.

The previous prime is 161006449. The next prime is 161006497. The reversal of 161006481 is 184600161.

161006481 is a `hidden beast` number, since 1 + 6 + 10 + 0 + 648 + 1 = 666.

It is not a de Polignac number, because 161006481 - 2⁵ = 161006449 is a prime.

It is a super-2 number, since 2×161006481² = 51846173848006722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5963203 = 161006481 / (1 + 6 + 1 + 0 + 0 + 6 + 4 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161006411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2981575 + ... + 2981628.

It is an arithmetic number, because the mean of its divisors is an integer number (29816020).

Almost surely, 2^161006481 is an apocalyptic number.

It is an amenable number.

161006481 is a deficient number, since it is larger than the sum of its proper divisors (77521679).

161006481 is an equidigital number, since it uses as much as digits as its factorization.

161006481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963212 (or 5963206 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 161006481 is about 12688.8329250566. The cubic root of 161006481 is about 544.0194821184.

The spelling of 161006481 in words is "one hundred sixty-one million, six thousand, four hundred eighty-one".