87638175767 has 2 divisors, whose sum is σ = 87638175768. Its totient is φ = 87638175766.

The previous prime is 87638175761. The next prime is 87638175817. The reversal of 87638175767 is 76757183678.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87638175767 - 2²⁰ = 87637127191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87638175761) 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, 43819087883 + 43819087884.

It is an arithmetic number, because the mean of its divisors is an integer number (43819087884).

Almost surely, 2^87638175767 is an apocalyptic number.

87638175767 is a deficient number, since it is larger than the sum of its proper divisors (1).

87638175767 is an equidigital number, since it uses as much as digits as its factorization.

87638175767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82978560, while the sum is 65.

The spelling of 87638175767 in words is "eighty-seven billion, six hundred thirty-eight million, one hundred seventy-five thousand, seven hundred sixty-seven".