18655097794387 has 2 divisors, whose sum is σ = 18655097794388. Its totient is φ = 18655097794386.

The previous prime is 18655097794369. The next prime is 18655097794429. The reversal of 18655097794387 is 78349779055681.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18655097794387 - 2⁷ = 18655097794259 is a prime.

It is not a weakly prime, because it can be changed into another prime (18655097794367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9327548897193 + 9327548897194.

It is an arithmetic number, because the mean of its divisors is an integer number (9327548897194).

Almost surely, 2^{18655097794387} is an apocalyptic number.

18655097794387 is a deficient number, since it is larger than the sum of its proper divisors (1).

18655097794387 is an equidigital number, since it uses as much as digits as its factorization.

18655097794387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200601600, while the sum is 79.

The spelling of 18655097794387 in words is "eighteen trillion, six hundred fifty-five billion, ninety-seven million, seven hundred ninety-four thousand, three hundred eighty-seven".