165500609001958 has 8 divisors (see below), whose sum is σ = 248318428040352. Its totient is φ = 82727799655176.

The previous prime is 165500609001901. The next prime is 165500609001967. The reversal of 165500609001958 is 859100906005561.

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

It is a junction number, because it is equal to n+sod(n) for n = 165500609001899 and 165500609001908.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 11252413710 + ... + 11252428417.

It is an arithmetic number, because the mean of its divisors is an integer number (31039803505044).

Almost surely, 2^{165500609001958} is an apocalyptic number.

165500609001958 is a deficient number, since it is larger than the sum of its proper divisors (82817819038394).

165500609001958 is a wasteful number, since it uses less digits than its factorization.

165500609001958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22504845806.

The product of its (nonzero) digits is 2916000, while the sum is 55.

The spelling of 165500609001958 in words is "one hundred sixty-five trillion, five hundred billion, six hundred nine million, one thousand, nine hundred fifty-eight".