6896527781 has 24 divisors (see below), whose sum is σ = 8295338016. Its totient is φ = 5652491040.

The previous prime is 6896527763. The next prime is 6896527801. The reversal of 6896527781 is 1877256986.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-6896527781 is a prime.

It is a super-2 number, since 2×6896527781² = 95124190868209567922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6896527781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6896527711) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 251366 + ... + 277448.

It is an arithmetic number, because the mean of its divisors is an integer number (345639084).

Almost surely, 2^6896527781 is an apocalyptic number.

It is an amenable number.

6896527781 is a deficient number, since it is larger than the sum of its proper divisors (1398810235).

6896527781 is a wasteful number, since it uses less digits than its factorization.

6896527781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26193 (or 26150 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 59.

The square root of 6896527781 is about 83045.3356968349. The cubic root of 6896527781 is about 1903.4588685246.

The spelling of 6896527781 in words is "six billion, eight hundred ninety-six million, five hundred twenty-seven thousand, seven hundred eighty-one".