1849318393651 has 2 divisors, whose sum is σ = 1849318393652. Its totient is φ = 1849318393650.

The previous prime is 1849318393619. The next prime is 1849318393687. The reversal of 1849318393651 is 1563938139481.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1563938139481) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1849318393651 - 2⁵ = 1849318393619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1849318393651.

It is not a weakly prime, because it can be changed into another prime (1849318393451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 924659196825 + 924659196826.

It is an arithmetic number, because the mean of its divisors is an integer number (924659196826).

Almost surely, 2^{1849318393651} is an apocalyptic number.

1849318393651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1849318393651 is an equidigital number, since it uses as much as digits as its factorization.

1849318393651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16796160, while the sum is 61.

The spelling of 1849318393651 in words is "one trillion, eight hundred forty-nine billion, three hundred eighteen million, three hundred ninety-three thousand, six hundred fifty-one".