1387765137769 has 2 divisors, whose sum is σ = 1387765137770. Its totient is φ = 1387765137768.

The previous prime is 1387765137719. The next prime is 1387765137833. The reversal of 1387765137769 is 9677315677831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1112782363225 + 274982774544 = 1054885^2 + 524388^2 .

It is a cyclic number.

It is not a de Polignac number, because 1387765137769 - 2¹⁷ = 1387765006697 is a prime.

It is a super-2 number, since 2×1387765137769² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1387765137698 and 1387765137707.

It is not a weakly prime, because it can be changed into another prime (1387765137719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693882568884 + 693882568885.

It is an arithmetic number, because the mean of its divisors is an integer number (693882568885).

Almost surely, 2^{1387765137769} is an apocalyptic number.

It is an amenable number.

1387765137769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387765137769 is an equidigital number, since it uses as much as digits as its factorization.

1387765137769 is an evil number, because the sum of its binary digits is even.

The product of its digits is 280052640, while the sum is 70.

The spelling of 1387765137769 in words is "one trillion, three hundred eighty-seven billion, seven hundred sixty-five million, one hundred thirty-seven thousand, seven hundred sixty-nine".