1280478866117 has 8 divisors (see below), whose sum is σ = 1457620211520. Its totient is φ = 1113459883360.

The previous prime is 1280478866087. The next prime is 1280478866143. The reversal of 1280478866117 is 7116688740821.

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

It is a de Polignac number, because none of the positive numbers 2^k-1280478866117 is a prime.

It is a super-2 number, since 2×1280478866117² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280478866167) 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, 2530590392 + ... + 2530590897.

It is an arithmetic number, because the mean of its divisors is an integer number (182202526440).

Almost surely, 2^{1280478866117} is an apocalyptic number.

It is an amenable number.

1280478866117 is a deficient number, since it is larger than the sum of its proper divisors (177141345403).

1280478866117 is a wasteful number, since it uses less digits than its factorization.

1280478866117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5061181323.

The product of its (nonzero) digits is 7225344, while the sum is 59.

The spelling of 1280478866117 in words is "one trillion, two hundred eighty billion, four hundred seventy-eight million, eight hundred sixty-six thousand, one hundred seventeen".