87380975689281 has 24 divisors (see below), whose sum is σ = 128488972772160. Its totient is φ = 57207406880736.

The previous prime is 87380975689247. The next prime is 87380975689303. The reversal of 87380975689281 is 18298657908378.

87380975689281 is a `hidden beast` number, since 8 + 7 + 380 + 9 + 75 + 6 + 8 + 92 + 81 = 666.

It is not a de Polignac number, because 87380975689281 - 2¹⁴ = 87380975672897 is a prime.

It is a super-2 number, since 2×87380975689281² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87380975689281.

It is not an unprimeable number, because it can be changed into a prime (87380975685281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84574050 + ... + 85601003.

It is an arithmetic number, because the mean of its divisors is an integer number (5353707198840).

Almost surely, 2^{87380975689281} is an apocalyptic number.

It is an amenable number.

87380975689281 is a deficient number, since it is larger than the sum of its proper divisors (41107997082879).

87380975689281 is a wasteful number, since it uses less digits than its factorization.

87380975689281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170176085 (or 170176082 counting only the distinct ones).

The product of its (nonzero) digits is 2926264320, while the sum is 81.

The spelling of 87380975689281 in words is "eighty-seven trillion, three hundred eighty billion, nine hundred seventy-five million, six hundred eighty-nine thousand, two hundred eighty-one".