78842771663 has 8 divisors (see below), whose sum is σ = 80162959632. Its totient is φ = 77532938496.

The previous prime is 78842771641. The next prime is 78842771669. The reversal of 78842771663 is 36617724887.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78842771663 - 2⁶ = 78842771599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78842771669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2573345 + ... + 2603802.

It is an arithmetic number, because the mean of its divisors is an integer number (10020369954).

Almost surely, 2^78842771663 is an apocalyptic number.

78842771663 is a deficient number, since it is larger than the sum of its proper divisors (1320187969).

78842771663 is a wasteful number, since it uses less digits than its factorization.

78842771663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5177401.

The product of its digits is 18966528, while the sum is 59.

The spelling of 78842771663 in words is "seventy-eight billion, eight hundred forty-two million, seven hundred seventy-one thousand, six hundred sixty-three".