1278583383779 has 8 divisors (see below), whose sum is σ = 1376956516992. Its totient is φ = 1180213188480.

The previous prime is 1278583383733. The next prime is 1278583383841. The reversal of 1278583383779 is 9773833858721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1278583383779 - 2²⁴ = 1278566606563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278583313779) 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, 214862 + ... + 1613484.

It is an arithmetic number, because the mean of its divisors is an integer number (172119564624).

Almost surely, 2^{1278583383779} is an apocalyptic number.

1278583383779 is a deficient number, since it is larger than the sum of its proper divisors (98373133213).

1278583383779 is a wasteful number, since it uses less digits than its factorization.

1278583383779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468957.

The product of its digits is 426746880, while the sum is 71.

The spelling of 1278583383779 in words is "one trillion, two hundred seventy-eight billion, five hundred eighty-three million, three hundred eighty-three thousand, seven hundred seventy-nine".