87069815771 has 2 divisors, whose sum is σ = 87069815772. Its totient is φ = 87069815770.

The previous prime is 87069815747. The next prime is 87069815801. The reversal of 87069815771 is 17751896078.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87069815771 - 2¹⁴ = 87069799387 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87069815771.

It is not a weakly prime, because it can be changed into another prime (87069815071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43534907885 + 43534907886.

It is an arithmetic number, because the mean of its divisors is an integer number (43534907886).

Almost surely, 2^87069815771 is an apocalyptic number.

87069815771 is a deficient number, since it is larger than the sum of its proper divisors (1).

87069815771 is an equidigital number, since it uses as much as digits as its factorization.

87069815771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5927040, while the sum is 59.

The spelling of 87069815771 in words is "eighty-seven billion, sixty-nine million, eight hundred fifteen thousand, seven hundred seventy-one".