1427109776689 has 9 divisors (see below), whose sum is σ = 1462816501761. Its totient is φ = 1392254436480.

The previous prime is 1427109776683. The next prime is 1427109776723. The reversal of 1427109776689 is 9866779017241.

The square root of 1427109776689 is 1194617.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 5272938225 + 1421836838464 = 72615^2 + 1192408^2 .

It is not a de Polignac number, because 1427109776689 - 2³⁹ = 877353962801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1427109776683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 48964729 + ... + 48993865.

Almost surely, 2^{1427109776689} is an apocalyptic number.

1427109776689 is the 1194617-th square number.

1427109776689 is the 597309-th centered octagonal number.

It is an amenable number.

1427109776689 is a deficient number, since it is larger than the sum of its proper divisors (35706725072).

1427109776689 is an frugal number, since it uses more digits than its factorization.

1427109776689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58356 (or 29178 counting only the distinct ones).

The product of its (nonzero) digits is 64012032, while the sum is 67.

The spelling of 1427109776689 in words is "one trillion, four hundred twenty-seven billion, one hundred nine million, seven hundred seventy-six thousand, six hundred eighty-nine".