1280656832016 has 40 divisors (see below), whose sum is σ = 3308404436064. Its totient is φ = 426880326400.

The previous prime is 1280656831901. The next prime is 1280656832047. The reversal of 1280656832016 is 6102386560821.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6666916 + ... + 6856316.

Almost surely, 2^{1280656832016} is an apocalyptic number.

1280656832016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1280656832016 is an abundant number, since it is smaller than the sum of its proper divisors (2027747604048).

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

1280656832016 is a wasteful number, since it uses less digits than its factorization.

1280656832016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330279 (or 330273 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 1280656832016 in words is "one trillion, two hundred eighty billion, six hundred fifty-six million, eight hundred thirty-two thousand, sixteen".