78863263661387 has 16 divisors (see below), whose sum is σ = 80541704255040. Its totient is φ = 77202483072000.

The previous prime is 78863263661383. The next prime is 78863263661419. The reversal of 78863263661387 is 78316636236887.

It is a cyclic number.

It is not a de Polignac number, because 78863263661387 - 2² = 78863263661383 is a prime.

It is a Duffinian number.

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 in 15 ways as a sum of consecutive naturals, for example, 297160562 + ... + 297425832.

It is an arithmetic number, because the mean of its divisors is an integer number (5033856515940).

Almost surely, 2^{78863263661387} is an apocalyptic number.

78863263661387 is a deficient number, since it is larger than the sum of its proper divisors (1678440593653).

78863263661387 is a wasteful number, since it uses less digits than its factorization.

78863263661387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298534.

The product of its digits is 1755758592, while the sum is 74.

The spelling of 78863263661387 in words is "seventy-eight trillion, eight hundred sixty-three billion, two hundred sixty-three million, six hundred sixty-one thousand, three hundred eighty-seven".