1618533805219 has 2 divisors, whose sum is σ = 1618533805220. Its totient is φ = 1618533805218.

The previous prime is 1618533805177. The next prime is 1618533805297. The reversal of 1618533805219 is 9125083358161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1618533805219 is a prime.

It is a super-2 number, since 2×1618533805219² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1618533809219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 809266902609 + 809266902610.

It is an arithmetic number, because the mean of its divisors is an integer number (809266902610).

Almost surely, 2^{1618533805219} is an apocalyptic number.

1618533805219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1618533805219 is an equidigital number, since it uses as much as digits as its factorization.

1618533805219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 52.

The spelling of 1618533805219 in words is "one trillion, six hundred eighteen billion, five hundred thirty-three million, eight hundred five thousand, two hundred nineteen".