12947778551603 has 8 divisors (see below), whose sum is σ = 14802943795200. Its totient is φ = 11093983956360.

The previous prime is 12947778551557. The next prime is 12947778551699. The reversal of 12947778551603 is 30615587774921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12947778551603 - 2⁸ = 12947778551347 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 12947778551603.

It is not an unprimeable number, because it can be changed into a prime (12947778551003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342641843 + ... + 342679628.

It is an arithmetic number, because the mean of its divisors is an integer number (1850367974400).

It is a 1-persistent number, because it is pandigital, but 2⋅12947778551603 = 25895557103206 is not.

Almost surely, 2^{12947778551603} is an apocalyptic number.

12947778551603 is a deficient number, since it is larger than the sum of its proper divisors (1855165243597).

12947778551603 is an equidigital number, since it uses as much as digits as its factorization.

12947778551603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685324177.

The product of its (nonzero) digits is 88905600, while the sum is 65.

The spelling of 12947778551603 in words is "twelve trillion, nine hundred forty-seven billion, seven hundred seventy-eight million, five hundred fifty-one thousand, six hundred three".