616778503 has 12 divisors (see below), whose sum is σ = 689068744. Its totient is φ = 551509200.

The previous prime is 616778447. The next prime is 616778549. The reversal of 616778503 is 305877616.

It is not a de Polignac number, because 616778503 - 2⁹ = 616777991 is a prime.

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 616778503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616778563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34401 + ... + 49162.

Almost surely, 2^616778503 is an apocalyptic number.

616778503 is a deficient number, since it is larger than the sum of its proper divisors (72290241).

616778503 is a wasteful number, since it uses less digits than its factorization.

616778503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83646 (or 83635 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 616778503 is about 24835.0257298035. The cubic root of 616778503 is about 851.2224638558. Note that the first 3 decimals are identical.

The spelling of 616778503 in words is "six hundred sixteen million, seven hundred seventy-eight thousand, five hundred three".