1313346278778 has 16 divisors (see below), whose sum is σ = 2626816928736. Its totient is φ = 437761364400.

The previous prime is 1313346278773. The next prime is 1313346278789. The reversal of 1313346278778 is 8778726433131.

It is not an unprimeable number, because it can be changed into a prime (1313346278773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5044573 + ... + 5298528.

It is an arithmetic number, because the mean of its divisors is an integer number (164176058046).

Almost surely, 2^{1313346278778} is an apocalyptic number.

1313346278778 is an abundant number, since it is smaller than the sum of its proper divisors (1313470649958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1313346278778 is a wasteful number, since it uses less digits than its factorization.

1313346278778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10364269.

The product of its digits is 28449792, while the sum is 60.

The spelling of 1313346278778 in words is "one trillion, three hundred thirteen billion, three hundred forty-six million, two hundred seventy-eight thousand, seven hundred seventy-eight".