1338493537637 has 2 divisors, whose sum is σ = 1338493537638. Its totient is φ = 1338493537636.

The previous prime is 1338493537573. The next prime is 1338493537687. The reversal of 1338493537637 is 7367353948331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1338126087076 + 367450561 = 1156774^2 + 19169^2 .

It is a cyclic number.

It is not a de Polignac number, because 1338493537637 - 2⁶ = 1338493537573 is a prime.

It is a super-2 number, since 2×1338493537637² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1338493537637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1338493537687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 669246768818 + 669246768819.

It is an arithmetic number, because the mean of its divisors is an integer number (669246768819).

Almost surely, 2^{1338493537637} is an apocalyptic number.

It is an amenable number.

1338493537637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1338493537637 is an equidigital number, since it uses as much as digits as its factorization.

1338493537637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 102876480, while the sum is 62.

The spelling of 1338493537637 in words is "one trillion, three hundred thirty-eight billion, four hundred ninety-three million, five hundred thirty-seven thousand, six hundred thirty-seven".