39077819529809 has 2 divisors, whose sum is σ = 39077819529810. Its totient is φ = 39077819529808.

The previous prime is 39077819529797. The next prime is 39077819529811. The reversal of 39077819529809 is 90892591877093.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31144245974209 + 7933573555600 = 5580703^2 + 2816660^2 .

It is an emirp because it is prime and its reverse (90892591877093) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39077819529809 - 2¹² = 39077819525713 is a prime.

Together with 39077819529811, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39077819529809.

It is not a weakly prime, because it can be changed into another prime (39077819529409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19538909764904 + 19538909764905.

It is an arithmetic number, because the mean of its divisors is an integer number (19538909764905).

Almost surely, 2^{39077819529809} is an apocalyptic number.

It is an amenable number.

39077819529809 is a deficient number, since it is larger than the sum of its proper divisors (1).

39077819529809 is an equidigital number, since it uses as much as digits as its factorization.

39077819529809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 617258880, while the sum is 77.

The spelling of 39077819529809 in words is "thirty-nine trillion, seventy-seven billion, eight hundred nineteen million, five hundred twenty-nine thousand, eight hundred nine".