165151651115605 has 32 divisors (see below), whose sum is σ = 247089880147968. Its totient is φ = 102949240507200.

The previous prime is 165151651115587. The next prime is 165151651115683. The reversal of 165151651115605 is 506511156151561.

It is a happy number.

It is not a de Polignac number, because 165151651115605 - 2⁹ = 165151651115093 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11266960 + ... + 21383350.

It is an arithmetic number, because the mean of its divisors is an integer number (7721558754624).

Almost surely, 2^{165151651115605} is an apocalyptic number.

It is an amenable number.

165151651115605 is a deficient number, since it is larger than the sum of its proper divisors (81938229032363).

165151651115605 is a wasteful number, since it uses less digits than its factorization.

165151651115605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10158817.

The product of its (nonzero) digits is 675000, while the sum is 49.

The spelling of 165151651115605 in words is "one hundred sixty-five trillion, one hundred fifty-one billion, six hundred fifty-one million, one hundred fifteen thousand, six hundred five".