161566012227205 has 8 divisors (see below), whose sum is σ = 193932028427904. Its totient is φ = 129217600611600.

The previous prime is 161566012227161. The next prime is 161566012227241. The reversal of 161566012227205 is 502722210665161.

It is a happy number.

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

It is not a de Polignac number, because 161566012227205 - 2¹¹ = 161566012225157 is a prime.

It is a super-2 number, since 2×161566012227205² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4401126081 + ... + 4401162790.

It is an arithmetic number, because the mean of its divisors is an integer number (24241503553488).

Almost surely, 2^{161566012227205} is an apocalyptic number.

It is an amenable number.

161566012227205 is a deficient number, since it is larger than the sum of its proper divisors (32366016200699).

161566012227205 is an equidigital number, since it uses as much as digits as its factorization.

161566012227205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8802292547.

The product of its (nonzero) digits is 604800, while the sum is 46.

The spelling of 161566012227205 in words is "one hundred sixty-one trillion, five hundred sixty-six billion, twelve million, two hundred twenty-seven thousand, two hundred five".