87380975685281 has 2 divisors, whose sum is σ = 87380975685282. Its totient is φ = 87380975685280.

The previous prime is 87380975685271. The next prime is 87380975685293. The reversal of 87380975685281 is 18258657908378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83833343163025 + 3547632522256 = 9156055^2 + 1883516^2 .

It is a cyclic number.

It is not a de Polignac number, because 87380975685281 - 2³⁰ = 87379901943457 is a prime.

It is a super-2 number, since 2×87380975685281² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87380975685221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43690487842640 + 43690487842641.

It is an arithmetic number, because the mean of its divisors is an integer number (43690487842641).

Almost surely, 2^{87380975685281} is an apocalyptic number.

It is an amenable number.

87380975685281 is a deficient number, since it is larger than the sum of its proper divisors (1).

87380975685281 is an equidigital number, since it uses as much as digits as its factorization.

87380975685281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1625702400, while the sum is 77.

The spelling of 87380975685281 in words is "eighty-seven trillion, three hundred eighty billion, nine hundred seventy-five million, six hundred eighty-five thousand, two hundred eighty-one".