79788366503 has 4 divisors (see below), whose sum is σ = 80277865848. Its totient is φ = 79298867160.

The previous prime is 79788366467. The next prime is 79788366521. The reversal of 79788366503 is 30566388797.

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

It is a cyclic number.

It is not a de Polignac number, because 79788366503 - 2³² = 75493399207 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 (79788366523) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 244749428 + ... + 244749753.

It is an arithmetic number, because the mean of its divisors is an integer number (20069466462).

Almost surely, 2^79788366503 is an apocalyptic number.

79788366503 is a deficient number, since it is larger than the sum of its proper divisors (489499345).

79788366503 is a wasteful number, since it uses less digits than its factorization.

79788366503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489499344.

The product of its (nonzero) digits is 45722880, while the sum is 62.

The spelling of 79788366503 in words is "seventy-nine billion, seven hundred eighty-eight million, three hundred sixty-six thousand, five hundred three".