7817641268 has 24 divisors (see below), whose sum is σ = 13729873920. Its totient is φ = 3894841440.

The previous prime is 7817641253. The next prime is 7817641277. The reversal of 7817641268 is 8621467187.

It is a happy number.

It is a super-3 number, since 3×7817641268³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251838 + ... + 2255306.

It is an arithmetic number, because the mean of its divisors is an integer number (572078080).

Almost surely, 2^7817641268 is an apocalyptic number.

It is an amenable number.

7817641268 is a deficient number, since it is larger than the sum of its proper divisors (5912232652).

7817641268 is a wasteful number, since it uses less digits than its factorization.

7817641268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5327 (or 5325 counting only the distinct ones).

The product of its digits is 903168, while the sum is 50.

The square root of 7817641268 is about 88417.4262688074. The cubic root of 7817641268 is about 1984.6864864070.

The spelling of 7817641268 in words is "seven billion, eight hundred seventeen million, six hundred forty-one thousand, two hundred sixty-eight".