78942844825063 has 4 divisors (see below), whose sum is σ = 78949813045840. Its totient is φ = 78935876604288.

The previous prime is 78942844824997. The next prime is 78942844825087. The reversal of 78942844825063 is 36052844824987.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78942844825063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78942844824983 and 78942844825001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78942844826063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3484093395 + ... + 3484116052.

It is an arithmetic number, because the mean of its divisors is an integer number (19737453261460).

Almost surely, 2^{78942844825063} is an apocalyptic number.

78942844825063 is a deficient number, since it is larger than the sum of its proper divisors (6968220777).

78942844825063 is a wasteful number, since it uses less digits than its factorization.

78942844825063 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6968220776.

The product of its (nonzero) digits is 743178240, while the sum is 70.

The spelling of 78942844825063 in words is "seventy-eight trillion, nine hundred forty-two billion, eight hundred forty-four million, eight hundred twenty-five thousand, sixty-three".