12678004252538 has 8 divisors (see below), whose sum is σ = 19017279003060. Its totient is φ = 6338911251520.

The previous prime is 12678004252523. The next prime is 12678004252559. The reversal of 12678004252538 is 83525240087621.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11408161494409 + 1269842758129 = 3377597^2 + 1126873^2 .

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

It is a super-2 number, since 2×12678004252538² (a number of 27 digits) contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12678004252538.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45262853 + ... + 45542088.

Almost surely, 2^{12678004252538} is an apocalyptic number.

12678004252538 is a deficient number, since it is larger than the sum of its proper divisors (6339274750522).

12678004252538 is an equidigital number, since it uses as much as digits as its factorization.

12678004252538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90874752.

The product of its (nonzero) digits is 6451200, while the sum is 53.

The spelling of 12678004252538 in words is "twelve trillion, six hundred seventy-eight billion, four million, two hundred fifty-two thousand, five hundred thirty-eight".