1387741138865 has 12 divisors (see below), whose sum is σ = 1740841250484. Its totient is φ = 1061923652064.

The previous prime is 1387741138841. The next prime is 1387741138961. The reversal of 1387741138865 is 5688311477831.

It can be written as a sum of positive squares in 2 ways, for example, as 180678553969 + 1207062584896 = 425063^2 + 1098664^2 .

It is not a de Polignac number, because 1387741138865 - 2⁶ = 1387741138801 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1387741138798 and 1387741138807.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 262330274 + ... + 262335563.

It is an arithmetic number, because the mean of its divisors is an integer number (145070104207).

Almost surely, 2^{1387741138865} is an apocalyptic number.

It is an amenable number.

1387741138865 is a deficient number, since it is larger than the sum of its proper divisors (353100111619).

1387741138865 is an equidigital number, since it uses as much as digits as its factorization.

1387741138865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524665888 (or 524665865 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 62.

The spelling of 1387741138865 in words is "one trillion, three hundred eighty-seven billion, seven hundred forty-one million, one hundred thirty-eight thousand, eight hundred sixty-five".