15865233350413 has 2 divisors, whose sum is σ = 15865233350414. Its totient is φ = 15865233350412.

The previous prime is 15865233350399. The next prime is 15865233350453. The reversal of 15865233350413 is 31405333256851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15355441634404 + 509791716009 = 3918602^2 + 713997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15865233350413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15865233350453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7932616675206 + 7932616675207.

It is an arithmetic number, because the mean of its divisors is an integer number (7932616675207).

Almost surely, 2^{15865233350413} is an apocalyptic number.

It is an amenable number.

15865233350413 is a deficient number, since it is larger than the sum of its proper divisors (1).

15865233350413 is an equidigital number, since it uses as much as digits as its factorization.

15865233350413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888000, while the sum is 49.

The spelling of 15865233350413 in words is "fifteen trillion, eight hundred sixty-five billion, two hundred thirty-three million, three hundred fifty thousand, four hundred thirteen".