12815693578 has 8 divisors (see below), whose sum is σ = 19225768320. Its totient is φ = 6407104140.

The previous prime is 12815693537. The next prime is 12815693621. The reversal of 12815693578 is 87539651821.

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, 349498 + ... + 384421.

It is an arithmetic number, because the mean of its divisors is an integer number (2403221040).

Almost surely, 2^12815693578 is an apocalyptic number.

12815693578 is a deficient number, since it is larger than the sum of its proper divisors (6410074742).

12815693578 is an equidigital number, since it uses as much as digits as its factorization.

12815693578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742652.

The product of its digits is 3628800, while the sum is 55.

The spelling of 12815693578 in words is "twelve billion, eight hundred fifteen million, six hundred ninety-three thousand, five hundred seventy-eight".