1428889566897 has 56 divisors (see below), whose sum is σ = 2313180570624. Its totient is φ = 877018562784.

The previous prime is 1428889566887. The next prime is 1428889566901. The reversal of 1428889566897 is 7986659888241.

1428889566897 is a `hidden beast` number, since 1 + 42 + 8 + 8 + 8 + 9 + 566 + 8 + 9 + 7 = 666.

It is not a de Polignac number, because 1428889566897 - 2⁶ = 1428889566833 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (81).

It is not an unprimeable number, because it can be changed into a prime (1428889566847) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3432858 + ... + 3826524.

It is an arithmetic number, because the mean of its divisors is an integer number (41306795904).

Almost surely, 2^{1428889566897} is an apocalyptic number.

It is an amenable number.

1428889566897 is a deficient number, since it is larger than the sum of its proper divisors (884291003727).

1428889566897 is an equidigital number, since it uses as much as digits as its factorization.

1428889566897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394081 (or 394066 counting only the distinct ones).

The product of its digits is 3344302080, while the sum is 81.

The spelling of 1428889566897 in words is "one trillion, four hundred twenty-eight billion, eight hundred eighty-nine million, five hundred sixty-six thousand, eight hundred ninety-seven".