12780916503 has 4 divisors (see below), whose sum is σ = 17041222008. Its totient is φ = 8520611000.

The previous prime is 12780916459. The next prime is 12780916513. The reversal of 12780916503 is 30561908721.

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 12780916503 - 2⁶ = 12780916439 is a prime.

It is a super-3 number, since 3×12780916503³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12780916513) 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, 2130152748 + ... + 2130152753.

It is an arithmetic number, because the mean of its divisors is an integer number (4260305502).

Almost surely, 2^12780916503 is an apocalyptic number.

12780916503 is a deficient number, since it is larger than the sum of its proper divisors (4260305505).

12780916503 is an equidigital number, since it uses as much as digits as its factorization.

12780916503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260305504.

The product of its (nonzero) digits is 90720, while the sum is 42.

The spelling of 12780916503 in words is "twelve billion, seven hundred eighty million, nine hundred sixteen thousand, five hundred three".