8688412781 has 8 divisors (see below), whose sum is σ = 8891625600. Its totient is φ = 8487445680.

The previous prime is 8688412763. The next prime is 8688412793. The reversal of 8688412781 is 1872148868.

8688412781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8688412781 is a prime.

It is a super-2 number, since 2×8688412781² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8688412741) 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 7 ways as a sum of consecutive naturals, for example, 553601 + ... + 569078.

It is an arithmetic number, because the mean of its divisors is an integer number (1111453200).

Almost surely, 2^8688412781 is an apocalyptic number.

It is an amenable number.

8688412781 is a deficient number, since it is larger than the sum of its proper divisors (203212819).

8688412781 is a wasteful number, since it uses less digits than its factorization.

8688412781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122859.

The product of its digits is 1376256, while the sum is 53.

The square root of 8688412781 is about 93211.6558215763. The cubic root of 8688412781 is about 2055.7966243094.

The spelling of 8688412781 in words is "eight billion, six hundred eighty-eight million, four hundred twelve thousand, seven hundred eighty-one".