80185642664507 has 2 divisors, whose sum is σ = 80185642664508. Its totient is φ = 80185642664506.

The previous prime is 80185642664489. The next prime is 80185642664527. The reversal of 80185642664507 is 70546624658108.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80185642664507 - 2⁶ = 80185642664443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80185642664507.

It is not a weakly prime, because it can be changed into another prime (80185642664527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40092821332253 + 40092821332254.

It is an arithmetic number, because the mean of its divisors is an integer number (40092821332254).

Almost surely, 2^{80185642664507} is an apocalyptic number.

80185642664507 is a deficient number, since it is larger than the sum of its proper divisors (1).

80185642664507 is an equidigital number, since it uses as much as digits as its factorization.

80185642664507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77414400, while the sum is 62.

The spelling of 80185642664507 in words is "eighty trillion, one hundred eighty-five billion, six hundred forty-two million, six hundred sixty-four thousand, five hundred seven".