267399649449 has 27 divisors (see below), whose sum is σ = 390486629637. Its totient is φ = 176329350144.

The previous prime is 267399649357. The next prime is 267399649453. The reversal of 267399649449 is 944946993762.

The square root of 267399649449 is 517107.

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

267399649449 is a `hidden beast` number, since 2 + 6 + 7 + 3 + 9 + 96 + 494 + 49 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 524089449 + 266875560000 = 22893^2 + 516600^2 .

It is not a de Polignac number, because 267399649449 - 2²³ = 267391260841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (267399649549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 150477249 + ... + 150479025.

Almost surely, 2^267399649449 is an apocalyptic number.

267399649449 is the 517107-th square number.

267399649449 is the 258554-th centered octagonal number.

It is an amenable number.

267399649449 is a deficient number, since it is larger than the sum of its proper divisors (123086980188).

267399649449 is an frugal number, since it uses more digits than its factorization.

267399649449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754 (or 1877 counting only the distinct ones).

The product of its digits is 634894848, while the sum is 72.

The spelling of 267399649449 in words is "two hundred sixty-seven billion, three hundred ninety-nine million, six hundred forty-nine thousand, four hundred forty-nine".