78338863503 has 40 divisors (see below), whose sum is σ = 121328113280. Its totient is φ = 50320128960.

The previous prime is 78338863483. The next prime is 78338863511. The reversal of 78338863503 is 30536883387.

It is a happy number.

78338863503 is a `hidden beast` number, since 78 + 3 + 3 + 8 + 8 + 63 + 503 = 666.

It is not a de Polignac number, because 78338863503 - 2²⁹ = 77801992591 is a prime.

It is a super-2 number, since 2×78338863503² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 78338863503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78338863583) 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 39 ways as a sum of consecutive naturals, for example, 506901 + ... + 643137.

It is an arithmetic number, because the mean of its divisors is an integer number (3033202832).

Almost surely, 2^78338863503 is an apocalyptic number.

78338863503 is a deficient number, since it is larger than the sum of its proper divisors (42989249777).

78338863503 is a wasteful number, since it uses less digits than its factorization.

78338863503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136509 (or 136500 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 54.

The spelling of 78338863503 in words is "seventy-eight billion, three hundred thirty-eight million, eight hundred sixty-three thousand, five hundred three".