1638496495411 has 2 divisors, whose sum is σ = 1638496495412. Its totient is φ = 1638496495410.

The previous prime is 1638496495397. The next prime is 1638496495451. The reversal of 1638496495411 is 1145946948361.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1638496495411 - 2¹⁵ = 1638496462643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1638496495411.

It is not a weakly prime, because it can be changed into another prime (1638496495451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819248247705 + 819248247706.

It is an arithmetic number, because the mean of its divisors is an integer number (819248247706).

Almost surely, 2^{1638496495411} is an apocalyptic number.

1638496495411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1638496495411 is an equidigital number, since it uses as much as digits as its factorization.

1638496495411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22394880, while the sum is 61.

The spelling of 1638496495411 in words is "one trillion, six hundred thirty-eight billion, four hundred ninety-six million, four hundred ninety-five thousand, four hundred eleven".