1539240015539 has 2 divisors, whose sum is σ = 1539240015540. Its totient is φ = 1539240015538.

The previous prime is 1539240015517. The next prime is 1539240015587. The reversal of 1539240015539 is 9355100429351.

It is a weak prime.

It is an emirp because it is prime and its reverse (9355100429351) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1539240015539 is a prime.

It is a super-2 number, since 2×1539240015539² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1539240015493 and 1539240015502.

It is not a weakly prime, because it can be changed into another prime (1539240011539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769620007769 + 769620007770.

It is an arithmetic number, because the mean of its divisors is an integer number (769620007770).

Almost surely, 2^{1539240015539} is an apocalyptic number.

1539240015539 is a deficient number, since it is larger than the sum of its proper divisors (1).

1539240015539 is an equidigital number, since it uses as much as digits as its factorization.

1539240015539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729000, while the sum is 47.

The spelling of 1539240015539 in words is "one trillion, five hundred thirty-nine billion, two hundred forty million, fifteen thousand, five hundred thirty-nine".