1428715866769 has 8 divisors (see below), whose sum is σ = 1429907051048. Its totient is φ = 1427525182080.

The previous prime is 1428715866733. The next prime is 1428715866827. The reversal of 1428715866769 is 9676685178241.

It can be written as a sum of positive squares in 4 ways, for example, as 25644819600 + 1403071047169 = 160140^2 + 1184513^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1428715866769 - 2¹⁷ = 1428715735697 is a prime.

It is a super-2 number, since 2×1428715866769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1428715866698 and 1428715866707.

It is not an unprimeable number, because it can be changed into a prime (1428715866169) 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, 5710039 + ... + 5954995.

It is an arithmetic number, because the mean of its divisors is an integer number (178738381381).

Almost surely, 2^{1428715866769} is an apocalyptic number.

It is an amenable number.

1428715866769 is a deficient number, since it is larger than the sum of its proper divisors (1191184279).

1428715866769 is a wasteful number, since it uses less digits than its factorization.

1428715866769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249795.

The product of its digits is 243855360, while the sum is 70.

The spelling of 1428715866769 in words is "one trillion, four hundred twenty-eight billion, seven hundred fifteen million, eight hundred sixty-six thousand, seven hundred sixty-nine".