1346791346778 has 32 divisors (see below), whose sum is σ = 2722096814976. Its totient is φ = 444180630528.

The previous prime is 1346791346777. The next prime is 1346791346801. The reversal of 1346791346778 is 8776431976431.

It is not an unprimeable number, because it can be changed into a prime (1346791346777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1822675 + ... + 2452697.

It is an arithmetic number, because the mean of its divisors is an integer number (85065525468).

Almost surely, 2^{1346791346778} is an apocalyptic number.

1346791346778 is an abundant number, since it is smaller than the sum of its proper divisors (1375305468198).

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

1346791346778 is a wasteful number, since it uses less digits than its factorization.

1346791346778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633798.

The product of its digits is 128024064, while the sum is 66.

The spelling of 1346791346778 in words is "one trillion, three hundred forty-six billion, seven hundred ninety-one million, three hundred forty-six thousand, seven hundred seventy-eight".