87365855977 has 2 divisors, whose sum is σ = 87365855978. Its totient is φ = 87365855976.

The previous prime is 87365855957. The next prime is 87365856007. The reversal of 87365855977 is 77955856378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72789881616 + 14575974361 = 269796^2 + 120731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87365855977 is a prime.

It is not a weakly prime, because it can be changed into another prime (87365855957) 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, 43682927988 + 43682927989.

It is an arithmetic number, because the mean of its divisors is an integer number (43682927989).

Almost surely, 2^87365855977 is an apocalyptic number.

It is an amenable number.

87365855977 is a deficient number, since it is larger than the sum of its proper divisors (1).

87365855977 is an equidigital number, since it uses as much as digits as its factorization.

87365855977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 444528000, while the sum is 70.

The spelling of 87365855977 in words is "eighty-seven billion, three hundred sixty-five million, eight hundred fifty-five thousand, nine hundred seventy-seven".