78863263661384 has 8 divisors (see below), whose sum is σ = 147868619365110. Its totient is φ = 39431631830688.

The previous prime is 78863263661383. The next prime is 78863263661419. The reversal of 78863263661384 is 48316636236887.

It can be written as a sum of positive squares in only one way, i.e., 76756347544900 + 2106916116484 = 8761070^2 + 1451522^2 .

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

It is not an unprimeable number, because it can be changed into a prime (78863263661383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4928953978829 + ... + 4928953978844.

Almost surely, 2^{78863263661384} is an apocalyptic number.

It is an amenable number.

78863263661384 is a deficient number, since it is larger than the sum of its proper divisors (69005355703726).

78863263661384 is a wasteful number, since it uses less digits than its factorization.

78863263661384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9857907957679 (or 9857907957675 counting only the distinct ones).

The product of its digits is 1003290624, while the sum is 71.

The spelling of 78863263661384 in words is "seventy-eight trillion, eight hundred sixty-three billion, two hundred sixty-three million, six hundred sixty-one thousand, three hundred eighty-four".