84640604648 has 8 divisors (see below), whose sum is σ = 158701133730. Its totient is φ = 42320302320.

The previous prime is 84640604617. The next prime is 84640604677.

84640604648 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 68015596804 + 16625007844 = 260798^2 + 128938^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 84640604596 and 84640604605.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5290037783 + ... + 5290037798.

Almost surely, 2^84640604648 is an apocalyptic number.

It is an amenable number.

84640604648 is a deficient number, since it is larger than the sum of its proper divisors (74060529082).

84640604648 is a wasteful number, since it uses less digits than its factorization.

84640604648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10580075587 (or 10580075583 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 50.

The spelling of 84640604648 in words is "eighty-four billion, six hundred forty million, six hundred four thousand, six hundred forty-eight".