7782685761 has 4 divisors (see below), whose sum is σ = 10376914352. Its totient is φ = 5188457172.

The previous prime is 7782685753. The next prime is 7782685787. The reversal of 7782685761 is 1675862877.

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 not a de Polignac number, because 7782685761 - 2³ = 7782685753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7782685861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1297114291 + ... + 1297114296.

It is an arithmetic number, because the mean of its divisors is an integer number (2594228588).

Almost surely, 2^7782685761 is an apocalyptic number.

It is an amenable number.

7782685761 is a deficient number, since it is larger than the sum of its proper divisors (2594228591).

7782685761 is a wasteful number, since it uses less digits than its factorization.

7782685761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594228590.

The product of its digits is 7902720, while the sum is 57.

The square root of 7782685761 is about 88219.5316299061. The cubic root of 7782685761 is about 1981.7239823752.

The spelling of 7782685761 in words is "seven billion, seven hundred eighty-two million, six hundred eighty-five thousand, seven hundred sixty-one".