165051115501 has 2 divisors, whose sum is σ = 165051115502. Its totient is φ = 165051115500.

The previous prime is 165051115477. The next prime is 165051115513. The reversal of 165051115501 is 105511150561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99155712100 + 65895403401 = 314890^2 + 256701^2 .

It is a cyclic number.

It is not a de Polignac number, because 165051115501 - 2²⁷ = 164916897773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165051125501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82525557750 + 82525557751.

It is an arithmetic number, because the mean of its divisors is an integer number (82525557751).

Almost surely, 2^165051115501 is an apocalyptic number.

It is an amenable number.

165051115501 is a deficient number, since it is larger than the sum of its proper divisors (1).

165051115501 is an equidigital number, since it uses as much as digits as its factorization.

165051115501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3750, while the sum is 31.

The spelling of 165051115501 in words is "one hundred sixty-five billion, fifty-one million, one hundred fifteen thousand, five hundred one".