12578025751618 has 4 divisors (see below), whose sum is σ = 18867038627430. Its totient is φ = 6289012875808.

The previous prime is 12578025751579. The next prime is 12578025751637. The reversal of 12578025751618 is 81615752087521.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7129503432769 + 5448522318849 = 2670113^2 + 2334207^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3144506437903 + ... + 3144506437906.

Almost surely, 2^{12578025751618} is an apocalyptic number.

12578025751618 is a deficient number, since it is larger than the sum of its proper divisors (6289012875812).

12578025751618 is an equidigital number, since it uses as much as digits as its factorization.

12578025751618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6289012875811.

The product of its (nonzero) digits is 9408000, while the sum is 58.

The spelling of 12578025751618 in words is "twelve trillion, five hundred seventy-eight billion, twenty-five million, seven hundred fifty-one thousand, six hundred eighteen".