87865602361 has 2 divisors, whose sum is σ = 87865602362. Its totient is φ = 87865602360.

The previous prime is 87865602301. The next prime is 87865602443. The reversal of 87865602361 is 16320656878.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86233846336 + 1631756025 = 293656^2 + 40395^2 .

It is a cyclic number.

It is not a de Polignac number, because 87865602361 - 2¹¹ = 87865600313 is a prime.

It is a super-2 number, since 2×87865602361² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87865602299 and 87865602308.

It is not a weakly prime, because it can be changed into another prime (87865602301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43932801180 + 43932801181.

It is an arithmetic number, because the mean of its divisors is an integer number (43932801181).

Almost surely, 2^87865602361 is an apocalyptic number.

It is an amenable number.

87865602361 is a deficient number, since it is larger than the sum of its proper divisors (1).

87865602361 is an equidigital number, since it uses as much as digits as its factorization.

87865602361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 52.

The spelling of 87865602361 in words is "eighty-seven billion, eight hundred sixty-five million, six hundred two thousand, three hundred sixty-one".