1538233466893 has 2 divisors, whose sum is σ = 1538233466894. Its totient is φ = 1538233466892.

The previous prime is 1538233466849. The next prime is 1538233466899. The reversal of 1538233466893 is 3986643328351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1193726686084 + 344506780809 = 1092578^2 + 586947^2 .

It is an emirp because it is prime and its reverse (3986643328351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1538233466893 - 2³⁷ = 1400794513421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1538233466899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769116733446 + 769116733447.

It is an arithmetic number, because the mean of its divisors is an integer number (769116733447).

Almost surely, 2^{1538233466893} is an apocalyptic number.

It is an amenable number.

1538233466893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1538233466893 is an equidigital number, since it uses as much as digits as its factorization.

1538233466893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67184640, while the sum is 61.

The spelling of 1538233466893 in words is "one trillion, five hundred thirty-eight billion, two hundred thirty-three million, four hundred sixty-six thousand, eight hundred ninety-three".