1320813718478 has 4 divisors (see below), whose sum is σ = 1981220577720. Its totient is φ = 660406859238.

The previous prime is 1320813718451. The next prime is 1320813718493. The reversal of 1320813718478 is 8748173180231.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330203429618 + ... + 330203429621.

It is an arithmetic number, because the mean of its divisors is an integer number (495305144430).

Almost surely, 2^{1320813718478} is an apocalyptic number.

1320813718478 is a deficient number, since it is larger than the sum of its proper divisors (660406859242).

1320813718478 is an equidigital number, since it uses as much as digits as its factorization.

1320813718478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660406859241.

The product of its (nonzero) digits is 1806336, while the sum is 53.

The spelling of 1320813718478 in words is "one trillion, three hundred twenty billion, eight hundred thirteen million, seven hundred eighteen thousand, four hundred seventy-eight".