12438902393501 has 2 divisors, whose sum is σ = 12438902393502. Its totient is φ = 12438902393500.

The previous prime is 12438902393497. The next prime is 12438902393509. The reversal of 12438902393501 is 10539320983421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6471503527225 + 5967398866276 = 2543915^2 + 2442826^2 .

It is an emirp because it is prime and its reverse (10539320983421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12438902393501 - 2² = 12438902393497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12438902393501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12438902393509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6219451196750 + 6219451196751.

It is an arithmetic number, because the mean of its divisors is an integer number (6219451196751).

Almost surely, 2^{12438902393501} is an apocalyptic number.

It is an amenable number.

12438902393501 is a deficient number, since it is larger than the sum of its proper divisors (1).

12438902393501 is an equidigital number, since it uses as much as digits as its factorization.

12438902393501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1399680, while the sum is 50.

The spelling of 12438902393501 in words is "twelve trillion, four hundred thirty-eight billion, nine hundred two million, three hundred ninety-three thousand, five hundred one".