12912263519578 has 8 divisors (see below), whose sum is σ = 19633715762868. Its totient is φ = 6367691598624.

The previous prime is 12912263519557. The next prime is 12912263519591. The reversal of 12912263519578 is 87591536221921.

It can be written as a sum of positive squares in 2 ways, for example, as 12551594809329 + 360668710249 = 3542823^2 + 600557^2 .

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

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, 44220080401 + ... + 44220080692.

Almost surely, 2^{12912263519578} is an apocalyptic number.

12912263519578 is a deficient number, since it is larger than the sum of its proper divisors (6721452243290).

12912263519578 is an equidigital number, since it uses as much as digits as its factorization.

12912263519578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88440161168.

The product of its digits is 16329600, while the sum is 61.

The spelling of 12912263519578 in words is "twelve trillion, nine hundred twelve billion, two hundred sixty-three million, five hundred nineteen thousand, five hundred seventy-eight".