1438358777893 has 2 divisors, whose sum is σ = 1438358777894. Its totient is φ = 1438358777892.

The previous prime is 1438358777837. The next prime is 1438358777923. The reversal of 1438358777893 is 3987778538341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1296405405604 + 141953372289 = 1138598^2 + 376767^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438358777893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438358777803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719179388946 + 719179388947.

It is an arithmetic number, because the mean of its divisors is an integer number (719179388947).

Almost surely, 2^{1438358777893} is an apocalyptic number.

It is an amenable number.

1438358777893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438358777893 is an equidigital number, since it uses as much as digits as its factorization.

1438358777893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 853493760, while the sum is 73.

The spelling of 1438358777893 in words is "one trillion, four hundred thirty-eight billion, three hundred fifty-eight million, seven hundred seventy-seven thousand, eight hundred ninety-three".