1387765277639 has 16 divisors (see below), whose sum is σ = 1546105747200. Its totient is φ = 1236797807616.

The previous prime is 1387765277627. The next prime is 1387765277747. The reversal of 1387765277639 is 9367725677831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387765277639 is a prime.

It is a Smith number, since the sum of its digits (71) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387765207639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15965207 + ... + 16051895.

It is an arithmetic number, because the mean of its divisors is an integer number (96631609200).

Almost surely, 2^{1387765277639} is an apocalyptic number.

1387765277639 is a deficient number, since it is larger than the sum of its proper divisors (158340469561).

1387765277639 is a wasteful number, since it uses less digits than its factorization.

1387765277639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129194.

The product of its digits is 560105280, while the sum is 71.

The spelling of 1387765277639 in words is "one trillion, three hundred eighty-seven billion, seven hundred sixty-five million, two hundred seventy-seven thousand, six hundred thirty-nine".