87226820165 has 16 divisors (see below), whose sum is σ = 108298998000. Its totient is φ = 67364355072.

The previous prime is 87226820147. The next prime is 87226820167. The reversal of 87226820165 is 56102862278.

It can be written as a sum of positive squares in 8 ways, for example, as 32920110721 + 54306709444 = 181439^2 + 233038^2 .

It is a cyclic number.

It is not a de Polignac number, because 87226820165 - 2⁶ = 87226820101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87226820167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 922511 + ... + 1012659.

It is an arithmetic number, because the mean of its divisors is an integer number (6768687375).

Almost surely, 2^87226820165 is an apocalyptic number.

It is an amenable number.

87226820165 is a deficient number, since it is larger than the sum of its proper divisors (21072177835).

87226820165 is a wasteful number, since it uses less digits than its factorization.

87226820165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96856.

The product of its (nonzero) digits is 645120, while the sum is 47.

The spelling of 87226820165 in words is "eighty-seven billion, two hundred twenty-six million, eight hundred twenty thousand, one hundred sixty-five".