7787820851713 has 4 divisors (see below), whose sum is σ = 8900366687680. Its totient is φ = 6675275015748.

The previous prime is 7787820851711. The next prime is 7787820851743. The reversal of 7787820851713 is 3171580287877.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7787820851713 - 2¹ = 7787820851711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7787820851711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556272917973 + ... + 556272917986.

It is an arithmetic number, because the mean of its divisors is an integer number (2225091671920).

Almost surely, 2^{7787820851713} is an apocalyptic number.

It is an amenable number.

7787820851713 is a deficient number, since it is larger than the sum of its proper divisors (1112545835967).

7787820851713 is a wasteful number, since it uses less digits than its factorization.

7787820851713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112545835966.

The product of its (nonzero) digits is 36879360, while the sum is 64.

The spelling of 7787820851713 in words is "seven trillion, seven hundred eighty-seven billion, eight hundred twenty million, eight hundred fifty-one thousand, seven hundred thirteen".