1267445904481 has 9 divisors (see below), whose sum is σ = 1312691819673. Its totient is φ = 1223709350640.

The previous prime is 1267445904437. The next prime is 1267445904499. The reversal of 1267445904481 is 1844095447621.

The square root of 1267445904481 is 1125809.

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 23774864481 + 1243671040000 = 154191^2 + 1115200^2 .

It is not a de Polignac number, because 1267445904481 - 2¹⁷ = 1267445773409 is a prime.

It is a super-2 number, since 2×1267445904481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1267445904181) 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, 32629051 + ... + 32667871.

Almost surely, 2^{1267445904481} is an apocalyptic number.

1267445904481 is the 1125809-th square number.

1267445904481 is the 562905-th centered octagonal number.

It is an amenable number.

1267445904481 is a deficient number, since it is larger than the sum of its proper divisors (45245915192).

1267445904481 is an frugal number, since it uses more digits than its factorization.

1267445904481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77700 (or 38850 counting only the distinct ones).

The product of its (nonzero) digits is 7741440, while the sum is 55.

The spelling of 1267445904481 in words is "one trillion, two hundred sixty-seven billion, four hundred forty-five million, nine hundred four thousand, four hundred eighty-one".