87633765019 has 2 divisors, whose sum is σ = 87633765020. Its totient is φ = 87633765018.

The previous prime is 87633765007. The next prime is 87633765073. The reversal of 87633765019 is 91056733678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87633765019 - 2²³ = 87625376411 is a prime.

It is a super-2 number, since 2×87633765019² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87633765319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43816882509 + 43816882510.

It is an arithmetic number, because the mean of its divisors is an integer number (43816882510).

Almost surely, 2^87633765019 is an apocalyptic number.

87633765019 is a deficient number, since it is larger than the sum of its proper divisors (1).

87633765019 is an equidigital number, since it uses as much as digits as its factorization.

87633765019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5715360, while the sum is 55.

The spelling of 87633765019 in words is "eighty-seven billion, six hundred thirty-three million, seven hundred sixty-five thousand, nineteen".