7782711797 has 12 divisors (see below), whose sum is σ = 9054825516. Its totient is φ = 6669815040.

The previous prime is 7782711791. The next prime is 7782711821. The reversal of 7782711797 is 7971172877.

7782711797 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1672319236 + 6110392561 = 40894^2 + 78169^2 .

It is not a de Polignac number, because 7782711797 - 2²⁰ = 7781663221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7782711791) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495647 + ... + 511107.

It is an arithmetic number, because the mean of its divisors is an integer number (754568793).

Almost surely, 2^7782711797 is an apocalyptic number.

It is an amenable number.

7782711797 is a deficient number, since it is larger than the sum of its proper divisors (1272113719).

7782711797 is a wasteful number, since it uses less digits than its factorization.

7782711797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25748 (or 25741 counting only the distinct ones).

The product of its digits is 2420208, while the sum is 56.

The square root of 7782711797 is about 88219.6791934770. The cubic root of 7782711797 is about 1981.7261922425.

The spelling of 7782711797 in words is "seven billion, seven hundred eighty-two million, seven hundred eleven thousand, seven hundred ninety-seven".