8219479768 has 8 divisors (see below), whose sum is σ = 15411524580. Its totient is φ = 4109739880.

The previous prime is 8219479729. The next prime is 8219479777. The reversal of 8219479768 is 8679749128.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×8219479768² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513717478 + ... + 513717493.

Almost surely, 2^8219479768 is an apocalyptic number.

It is an amenable number.

8219479768 is a deficient number, since it is larger than the sum of its proper divisors (7192044812).

8219479768 is a wasteful number, since it uses less digits than its factorization.

8219479768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027434977 (or 1027434973 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 61.

The square root of 8219479768 is about 90661.3466037208. The cubic root of 8219479768 is about 2018.1252226057.

The spelling of 8219479768 in words is "eight billion, two hundred nineteen million, four hundred seventy-nine thousand, seven hundred sixty-eight".