161770230155 has 8 divisors (see below), whose sum is σ = 194134293600. Its totient is φ = 129409505856.

The previous prime is 161770230137. The next prime is 161770230169. The reversal of 161770230155 is 551032077161.

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

It is a cyclic number.

It is not a de Polignac number, because 161770230155 - 2⁸ = 161770229899 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 726935 + ... + 923024.

It is an arithmetic number, because the mean of its divisors is an integer number (24266786700).

Almost surely, 2^161770230155 is an apocalyptic number.

161770230155 is a deficient number, since it is larger than the sum of its proper divisors (32364063445).

161770230155 is a wasteful number, since it uses less digits than its factorization.

161770230155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1669573.

The product of its (nonzero) digits is 44100, while the sum is 38.

The spelling of 161770230155 in words is "one hundred sixty-one billion, seven hundred seventy million, two hundred thirty thousand, one hundred fifty-five".