18616202794361 has 2 divisors, whose sum is σ = 18616202794362. Its totient is φ = 18616202794360.

The previous prime is 18616202794333. The next prime is 18616202794447. The reversal of 18616202794361 is 16349720261681.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13691154424336 + 4925048370025 = 3700156^2 + 2219245^2 .

It is a cyclic number.

It is not a de Polignac number, because 18616202794361 - 2⁶ = 18616202794297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18616202794297 and 18616202794306.

It is not a weakly prime, because it can be changed into another prime (18616202794061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9308101397180 + 9308101397181.

It is an arithmetic number, because the mean of its divisors is an integer number (9308101397181).

Almost surely, 2^{18616202794361} is an apocalyptic number.

It is an amenable number.

18616202794361 is a deficient number, since it is larger than the sum of its proper divisors (1).

18616202794361 is an equidigital number, since it uses as much as digits as its factorization.

18616202794361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 18616202794361 in words is "eighteen trillion, six hundred sixteen billion, two hundred two million, seven hundred ninety-four thousand, three hundred sixty-one".