165656115605 has 8 divisors (see below), whose sum is σ = 198795963264. Its totient is φ = 132519142800.

The previous prime is 165656115533. The next prime is 165656115637. The reversal of 165656115605 is 506511656561.

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

It is not a de Polignac number, because 165656115605 - 2⁸ = 165656115349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165656115605.

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, 589841 + ... + 824150.

It is an arithmetic number, because the mean of its divisors is an integer number (24849495408).

Almost surely, 2^165656115605 is an apocalyptic number.

It is an amenable number.

165656115605 is a deficient number, since it is larger than the sum of its proper divisors (33139847659).

165656115605 is a wasteful number, since it uses less digits than its factorization.

165656115605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437427.

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 165656115605 in words is "one hundred sixty-five billion, six hundred fifty-six million, one hundred fifteen thousand, six hundred five".