12783944555 has 16 divisors (see below), whose sum is σ = 15899917440. Its totient is φ = 9859439232.

The previous prime is 12783944539. The next prime is 12783944683. The reversal of 12783944555 is 55544938721.

It is a cyclic number.

It is not a de Polignac number, because 12783944555 - 2⁴ = 12783944539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12783944497 and 12783944506.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 296819 + ... + 337148.

It is an arithmetic number, because the mean of its divisors is an integer number (993744840).

Almost surely, 2^12783944555 is an apocalyptic number.

12783944555 is a deficient number, since it is larger than the sum of its proper divisors (3115972885).

12783944555 is a wasteful number, since it uses less digits than its factorization.

12783944555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634118.

The product of its digits is 6048000, while the sum is 53.

The spelling of 12783944555 in words is "twelve billion, seven hundred eighty-three million, nine hundred forty-four thousand, five hundred fifty-five".