12947778551698 has 8 divisors (see below), whose sum is σ = 19537965240192. Its totient is φ = 6435123471636.

The previous prime is 12947778551557. The next prime is 12947778551699. The reversal of 12947778551698 is 89615587774921.

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

It is not an unprimeable number, because it can be changed into a prime (12947778551699) 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, 19382901690 + ... + 19382902357.

It is an arithmetic number, because the mean of its divisors is an integer number (2442245655024).

Almost surely, 2^{12947778551698} is an apocalyptic number.

12947778551698 is a deficient number, since it is larger than the sum of its proper divisors (6590186688494).

12947778551698 is a wasteful number, since it uses less digits than its factorization.

12947778551698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38765804216.

The product of its digits is 2133734400, while the sum is 79.

The spelling of 12947778551698 in words is "twelve trillion, nine hundred forty-seven billion, seven hundred seventy-eight million, five hundred fifty-one thousand, six hundred ninety-eight".