161011005 has 8 divisors (see below), whose sum is σ = 257617632. Its totient is φ = 85872528.

The previous prime is 161011001. The next prime is 161011009. The reversal of 161011005 is 500110161.

It is an interprime number because it is at equal distance from previous prime (161011001) and next prime (161011009).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161011005 - 2² = 161011001 is a prime.

It is a super-2 number, since 2×161011005² = 51849087462220050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 10734067 = 161011005 / (1 + 6 + 1 + 0 + 1 + 1 + 0 + 0 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161011001) 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, 5367019 + ... + 5367048.

It is an arithmetic number, because the mean of its divisors is an integer number (32202204).

Almost surely, 2^161011005 is an apocalyptic number.

161011005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

161011005 is a deficient number, since it is larger than the sum of its proper divisors (96606627).

161011005 is a wasteful number, since it uses less digits than its factorization.

161011005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10734075.

The product of its (nonzero) digits is 30, while the sum is 15.

The square root of 161011005 is about 12689.0111907902. The cubic root of 161011005 is about 544.0245774021.

Adding to 161011005 its reverse (500110161), we get a palindrome (661121166).

The spelling of 161011005 in words is "one hundred sixty-one million, eleven thousand, five".