1389153709649 has 6 divisors (see below), whose sum is σ = 1475675394294. Its totient is φ = 1307438785280.

The previous prime is 1389153709633. The next prime is 1389153709661. The reversal of 1389153709649 is 9469073519831.

It can be written as a sum of positive squares in 3 ways, for example, as 1073161324225 + 315992385424 = 1035935^2 + 562132^2 .

It is not a de Polignac number, because 1389153709649 - 2⁴ = 1389153709633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1389153709249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2403379832 + ... + 2403380409.

It is an arithmetic number, because the mean of its divisors is an integer number (245945899049).

Almost surely, 2^{1389153709649} is an apocalyptic number.

It is an amenable number.

1389153709649 is a deficient number, since it is larger than the sum of its proper divisors (86521684645).

1389153709649 is an equidigital number, since it uses as much as digits as its factorization.

1389153709649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4806760275 (or 4806760258 counting only the distinct ones).

The product of its (nonzero) digits is 44089920, while the sum is 65.

The spelling of 1389153709649 in words is "one trillion, three hundred eighty-nine billion, one hundred fifty-three million, seven hundred nine thousand, six hundred forty-nine".