1539744873361 has 2 divisors, whose sum is σ = 1539744873362. Its totient is φ = 1539744873360.

The previous prime is 1539744873347. The next prime is 1539744873379. The reversal of 1539744873361 is 1633784479351.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 918446222736 + 621298650625 = 958356^2 + 788225^2 .

It is a cyclic number.

It is not a de Polignac number, because 1539744873361 - 2¹⁵ = 1539744840593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1539744873361.

It is not a weakly prime, because it can be changed into another prime (1539744873341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769872436680 + 769872436681.

It is an arithmetic number, because the mean of its divisors is an integer number (769872436681).

Almost surely, 2^{1539744873361} is an apocalyptic number.

It is an amenable number.

1539744873361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1539744873361 is an equidigital number, since it uses as much as digits as its factorization.

1539744873361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 61.

The spelling of 1539744873361 in words is "one trillion, five hundred thirty-nine billion, seven hundred forty-four million, eight hundred seventy-three thousand, three hundred sixty-one".