165755605231 has 8 divisors (see below), whose sum is σ = 169620943184. Its totient is φ = 161890747200.

The previous prime is 165755605159. The next prime is 165755605261. The reversal of 165755605231 is 132506557561.

It is a happy number.

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 165755605231 - 2⁹ = 165755604719 is a prime.

It is a super-2 number, since 2×165755605231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165755605261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 633331 + ... + 855931.

It is an arithmetic number, because the mean of its divisors is an integer number (21202617898).

Almost surely, 2^165755605231 is an apocalyptic number.

165755605231 is a deficient number, since it is larger than the sum of its proper divisors (3865337953).

165755605231 is a wasteful number, since it uses less digits than its factorization.

165755605231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239961.

The product of its (nonzero) digits is 945000, while the sum is 46.

The spelling of 165755605231 in words is "one hundred sixty-five billion, seven hundred fifty-five million, six hundred five thousand, two hundred thirty-one".