12743318556 has 18 divisors (see below), whose sum is σ = 32212277552. Its totient is φ = 4247772840.

The previous prime is 12743318551. The next prime is 12743318561. The reversal of 12743318556 is 65581334721.

It is a happy number.

12743318556 is a `hidden beast` number, since 1 + 27 + 43 + 31 + 8 + 556 = 666.

It is an interprime number because it is at equal distance from previous prime (12743318551) and next prime (12743318561).

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12743318551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 176990500 + ... + 176990571.

Almost surely, 2^12743318556 is an apocalyptic number.

It is an amenable number.

12743318556 is an abundant number, since it is smaller than the sum of its proper divisors (19468958996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12743318556 is a wasteful number, since it uses less digits than its factorization.

12743318556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353981081 (or 353981076 counting only the distinct ones).

The product of its digits is 604800, while the sum is 45.

The spelling of 12743318556 in words is "twelve billion, seven hundred forty-three million, three hundred eighteen thousand, five hundred fifty-six".