165561000651005 has 16 divisors (see below), whose sum is σ = 207073101241344. Its totient is φ = 126931828861440.

The previous prime is 165561000651001. The next prime is 165561000651023. The reversal of 165561000651005 is 500156000165561.

It is not a de Polignac number, because 165561000651005 - 2² = 165561000651001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165561000651001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5185107764 + ... + 5185139693.

It is an arithmetic number, because the mean of its divisors is an integer number (12942068827584).

Almost surely, 2^{165561000651005} is an apocalyptic number.

It is an amenable number.

165561000651005 is a deficient number, since it is larger than the sum of its proper divisors (41512100590339).

165561000651005 is a wasteful number, since it uses less digits than its factorization.

165561000651005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370247596.

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 165561000651005 in words is "one hundred sixty-five trillion, five hundred sixty-one billion, six hundred fifty-one thousand, five".