1287379453869 has 12 divisors (see below), whose sum is σ = 1923670448700. Its totient is φ = 828658039104.

The previous prime is 1287379453819. The next prime is 1287379453903. The reversal of 1287379453869 is 9683549737821.

1287379453869 is a `hidden beast` number, since 1 + 2 + 87 + 3 + 7 + 9 + 4 + 538 + 6 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 383668748100 + 903710705769 = 619410^2 + 950637^2 .

It is not a de Polignac number, because 1287379453869 - 2¹⁵ = 1287379421101 is a prime.

It is a super-2 number, since 2×1287379453869² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1287379453797 and 1287379453806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287379453819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2466243904 + ... + 2466244425.

It is an arithmetic number, because the mean of its divisors is an integer number (160305870725).

Almost surely, 2^{1287379453869} is an apocalyptic number.

It is an amenable number.

1287379453869 is a deficient number, since it is larger than the sum of its proper divisors (636290994831).

1287379453869 is a wasteful number, since it uses less digits than its factorization.

1287379453869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932488364 (or 4932488361 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 72.

The spelling of 1287379453869 in words is "one trillion, two hundred eighty-seven billion, three hundred seventy-nine million, four hundred fifty-three thousand, eight hundred sixty-nine".