87505515169 has 2 divisors, whose sum is σ = 87505515170. Its totient is φ = 87505515168.

The previous prime is 87505515103. The next prime is 87505515239. The reversal of 87505515169 is 96151550578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83752360000 + 3753155169 = 289400^2 + 61263^2 .

It is a cyclic number.

It is not a de Polignac number, because 87505515169 - 2²¹ = 87503418017 is a prime.

It is a super-2 number, since 2×87505515169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87505515469) 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 as a sum of consecutive naturals, namely, 43752757584 + 43752757585.

It is an arithmetic number, because the mean of its divisors is an integer number (43752757585).

Almost surely, 2^87505515169 is an apocalyptic number.

It is an amenable number.

87505515169 is a deficient number, since it is larger than the sum of its proper divisors (1).

87505515169 is an equidigital number, since it uses as much as digits as its factorization.

87505515169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890000, while the sum is 52.

The spelling of 87505515169 in words is "eighty-seven billion, five hundred five million, five hundred fifteen thousand, one hundred sixty-nine".