165605005156 has 12 divisors (see below), whose sum is σ = 295974903168. Its totient is φ = 81040747112.

The previous prime is 165605005133. The next prime is 165605005169. The reversal of 165605005156 is 651500506561.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 440438656 + ... + 440439031.

It is an arithmetic number, because the mean of its divisors is an integer number (24664575264).

Almost surely, 2^165605005156 is an apocalyptic number.

It is an amenable number.

165605005156 is a deficient number, since it is larger than the sum of its proper divisors (130369898012).

165605005156 is a wasteful number, since it uses less digits than its factorization.

165605005156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 880877738 (or 880877736 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 165605005156 in words is "one hundred sixty-five billion, six hundred five million, five thousand, one hundred fifty-six".