134805126734721 has 27 divisors (see below), whose sum is σ = 203553836472259. Its totient is φ = 85962178647312.

The previous prime is 134805126734687. The next prime is 134805126734743. The reversal of 134805126734721 is 127437621508431.

The square root of 134805126734721 is 11610561.

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

134805126734721 is a `hidden beast` number, since 1 + 3 + 4 + 8 + 0 + 512 + 67 + 3 + 47 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 134264107643121 + 541019091600 = 11587239^2 + 735540^2 .

It is not a de Polignac number, because 134805126734721 - 2²⁷ = 134804992516993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134805126734221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 801044575 + ... + 801212843.

Almost surely, 2^{134805126734721} is an apocalyptic number.

134805126734721 is the 11610561-st square number.

134805126734721 is the 5805281-st centered octagonal number.

It is an amenable number.

134805126734721 is a deficient number, since it is larger than the sum of its proper divisors (68748709737538).

134805126734721 is an frugal number, since it uses more digits than its factorization.

134805126734721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336590 (or 168295 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 134805126734721 in words is "one hundred thirty-four trillion, eight hundred five billion, one hundred twenty-six million, seven hundred thirty-four thousand, seven hundred twenty-one".