12978618733 has 16 divisors (see below), whose sum is σ = 14043484800. Its totient is φ = 11957520960.

The previous prime is 12978618707. The next prime is 12978618767. The reversal of 12978618733 is 33781687921.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12978618733 - 2¹⁷ = 12978487661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12978658733) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257698 + ... + 303916.

It is an arithmetic number, because the mean of its divisors is an integer number (877717800).

Almost surely, 2^12978618733 is an apocalyptic number.

It is an amenable number.

12978618733 is a deficient number, since it is larger than the sum of its proper divisors (1064866067).

12978618733 is a wasteful number, since it uses less digits than its factorization.

12978618733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46692.

The product of its digits is 3048192, while the sum is 55.

The spelling of 12978618733 in words is "twelve billion, nine hundred seventy-eight million, six hundred eighteen thousand, seven hundred thirty-three".