1279810276369 has 9 divisors (see below), whose sum is σ = 1310315274363. Its totient is φ = 1249999732632.

The previous prime is 1279810276301. The next prime is 1279810276441. The reversal of 1279810276369 is 9636720189721.

The square root of 1279810276369 is 1131287.

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

It can be written as a sum of positive squares in only one way, i.e., 103756784769 + 1176053491600 = 322113^2 + 1084460^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1279810276369 is a prime.

It is a super-2 number, since 2×1279810276369² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1279810976369) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 48632187 + ... + 48658495.

Almost surely, 2^{1279810276369} is an apocalyptic number.

1279810276369 is the 1131287-th square number.

1279810276369 is the 565644-th centered octagonal number.

It is an amenable number.

1279810276369 is a deficient number, since it is larger than the sum of its proper divisors (30504997994).

1279810276369 is an frugal number, since it uses more digits than its factorization.

1279810276369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52704 (or 26352 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 1279810276369 in words is "one trillion, two hundred seventy-nine billion, eight hundred ten million, two hundred seventy-six thousand, three hundred sixty-nine".