1278508740339 has 16 divisors (see below), whose sum is σ = 1727445056000. Its totient is φ = 840970649376.

The previous prime is 1278508740277. The next prime is 1278508740349. The reversal of 1278508740339 is 9330478058721.

It is not a de Polignac number, because 1278508740339 - 2¹³ = 1278508732147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278508740349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1511989 + ... + 2200710.

It is an arithmetic number, because the mean of its divisors is an integer number (107965316000).

Almost surely, 2^{1278508740339} is an apocalyptic number.

1278508740339 is a deficient number, since it is larger than the sum of its proper divisors (448936315661).

1278508740339 is a wasteful number, since it uses less digits than its factorization.

1278508740339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3714234.

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 1278508740339 in words is "one trillion, two hundred seventy-eight billion, five hundred eight million, seven hundred forty thousand, three hundred thirty-nine".