864977779468 has 12 divisors (see below), whose sum is σ = 1651321215432. Its totient is φ = 393171717920.

The previous prime is 864977779381. The next prime is 864977779469.

864977779468 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 864977779391 and 864977779400.

It is not an unprimeable number, because it can be changed into a prime (864977779469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9829292905 + ... + 9829292992.

It is an arithmetic number, because the mean of its divisors is an integer number (137610101286).

Almost surely, 2^864977779468 is an apocalyptic number.

It is an amenable number.

864977779468 is a deficient number, since it is larger than the sum of its proper divisors (786343435964).

864977779468 is a wasteful number, since it uses less digits than its factorization.

864977779468 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19658585912 (or 19658585910 counting only the distinct ones).

The product of its digits is 7169347584, while the sum is 82.

The spelling of 864977779468 in words is "eight hundred sixty-four billion, nine hundred seventy-seven million, seven hundred seventy-nine thousand, four hundred sixty-eight".