534125643921 has 9 divisors (see below), whose sum is σ = 771517985979. Its totient is φ = 356082300936.

The previous prime is 534125643913. The next prime is 534125643923. The reversal of 534125643921 is 129346521435.

The square root of 534125643921 is 730839.

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

534125643921 is a `hidden beast` number, since 5 + 3 + 4 + 1 + 256 + 4 + 392 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 409683204225 + 124442439696 = 640065^2 + 352764^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 534125643921 - 2³ = 534125643913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (534125643923) 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, 2070711 + ... + 2314323.

Almost surely, 2^534125643921 is an apocalyptic number.

534125643921 is the 730839-th square number.

534125643921 is the 365420-th centered octagonal number.

It is an amenable number.

534125643921 is a deficient number, since it is larger than the sum of its proper divisors (237392342058).

534125643921 is an frugal number, since it uses more digits than its factorization.

534125643921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487232 (or 243616 counting only the distinct ones).

The product of its digits is 777600, while the sum is 45.

The spelling of 534125643921 in words is "five hundred thirty-four billion, one hundred twenty-five million, six hundred forty-three thousand, nine hundred twenty-one".