87219018386767 has 2 divisors, whose sum is σ = 87219018386768. Its totient is φ = 87219018386766.

The previous prime is 87219018386707. The next prime is 87219018386779. The reversal of 87219018386767 is 76768381091278.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87219018386767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87219018386767.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87219018386707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43609509193383 + 43609509193384.

It is an arithmetic number, because the mean of its divisors is an integer number (43609509193384).

Almost surely, 2^{87219018386767} is an apocalyptic number.

87219018386767 is a deficient number, since it is larger than the sum of its proper divisors (1).

87219018386767 is an equidigital number, since it uses as much as digits as its factorization.

87219018386767 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 341397504, while the sum is 73.

The spelling of 87219018386767 in words is "eighty-seven trillion, two hundred nineteen billion, eighteen million, three hundred eighty-six thousand, seven hundred sixty-seven".