1382280978817 has 4 divisors (see below), whose sum is σ = 1397812225860. Its totient is φ = 1366749731776.

The previous prime is 1382280978791. The next prime is 1382280978833. The reversal of 1382280978817 is 7188790822831.

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

It can be written as a sum of positive squares in 2 ways, for example, as 754875994896 + 627404983921 = 868836^2 + 792089^2 .

It is a cyclic number.

It is not a de Polignac number, because 1382280978817 - 2³⁹ = 832525164929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1382280978887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7765623388 + ... + 7765623565.

It is an arithmetic number, because the mean of its divisors is an integer number (349453056465).

Almost surely, 2^{1382280978817} is an apocalyptic number.

It is an amenable number.

1382280978817 is a deficient number, since it is larger than the sum of its proper divisors (15531247043).

1382280978817 is an equidigital number, since it uses as much as digits as its factorization.

1382280978817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15531247042.

The product of its (nonzero) digits is 21676032, while the sum is 64.

The spelling of 1382280978817 in words is "one trillion, three hundred eighty-two billion, two hundred eighty million, nine hundred seventy-eight thousand, eight hundred seventeen".