1578368605427 has 4 divisors (see below), whose sum is σ = 1578619186200. Its totient is φ = 1578118024656.

The previous prime is 1578368605403. The next prime is 1578368605439. The reversal of 1578368605427 is 7245068638751.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1578368605427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1578368605427.

It is not an unprimeable number, because it can be changed into a prime (1578368605487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125280938 + ... + 125293535.

It is an arithmetic number, because the mean of its divisors is an integer number (394654796550).

Almost surely, 2^{1578368605427} is an apocalyptic number.

1578368605427 is a deficient number, since it is larger than the sum of its proper divisors (250580773).

1578368605427 is an equidigital number, since it uses as much as digits as its factorization.

1578368605427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250580772.

The product of its (nonzero) digits is 67737600, while the sum is 62.

The spelling of 1578368605427 in words is "one trillion, five hundred seventy-eight billion, three hundred sixty-eight million, six hundred five thousand, four hundred twenty-seven".