1287914345856 has 128 divisors (see below), whose sum is σ = 3853207202400. Its totient is φ = 423423811584.

The previous prime is 1287914345833. The next prime is 1287914345857. The reversal of 1287914345856 is 6585434197821.

It is a happy number.

1287914345856 is a `hidden beast` number, since 1 + 2 + 8 + 7 + 9 + 1 + 43 + 4 + 585 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1287914345793 and 1287914345802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287914345857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2300181 + ... + 2804756.

Almost surely, 2^{1287914345856} is an apocalyptic number.

1287914345856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1287914345856 is an abundant number, since it is smaller than the sum of its proper divisors (2565292856544).

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

1287914345856 is an equidigital number, since it uses as much as digits as its factorization.

1287914345856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105033 (or 5105015 counting only the distinct ones).

The product of its digits is 58060800, while the sum is 63.

The spelling of 1287914345856 in words is "one trillion, two hundred eighty-seven billion, nine hundred fourteen million, three hundred forty-five thousand, eight hundred fifty-six".