1280724427056 has 20 divisors (see below), whose sum is σ = 3308538103352. Its totient is φ = 426908142336.

The previous prime is 1280724426979. The next prime is 1280724427189. The reversal of 1280724427056 is 6507244270821.

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 26681758897 = 1280724427056 / (1 + 2 + 8 + 0 + 7 + 2 + 4 + 4 + 2 + 7 + 0 + 5 + 6).

It is a junction number, because it is equal to n+sod(n) for n = 1280724426996 and 1280724427014.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13340879401 + ... + 13340879496.

Almost surely, 2^{1280724427056} is an apocalyptic number.

1280724427056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1280724427056 is an abundant number, since it is smaller than the sum of its proper divisors (2027813676296).

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

1280724427056 is a wasteful number, since it uses less digits than its factorization.

1280724427056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26681758908 (or 26681758902 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 48.

Adding to 1280724427056 its reverse (6507244270821), we get a palindrome (7787968697877).

The spelling of 1280724427056 in words is "one trillion, two hundred eighty billion, seven hundred twenty-four million, four hundred twenty-seven thousand, fifty-six".