7218646861087 has 2 divisors, whose sum is σ = 7218646861088. Its totient is φ = 7218646861086.

The previous prime is 7218646861079. The next prime is 7218646861103. The reversal of 7218646861087 is 7801686468127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7218646861087 - 2³ = 7218646861079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7218646861057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3609323430543 + 3609323430544.

It is an arithmetic number, because the mean of its divisors is an integer number (3609323430544).

Almost surely, 2^{7218646861087} is an apocalyptic number.

7218646861087 is a deficient number, since it is larger than the sum of its proper divisors (1).

7218646861087 is an equidigital number, since it uses as much as digits as its factorization.

7218646861087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43352064, while the sum is 64.

The spelling of 7218646861087 in words is "seven trillion, two hundred eighteen billion, six hundred forty-six million, eight hundred sixty-one thousand, eighty-seven".