53843025681 has 9 divisors (see below), whose sum is σ = 77774264841. Its totient is φ = 35894886372.

The previous prime is 53843025667. The next prime is 53843025697. The reversal of 53843025681 is 18652034835.

The square root of 53843025681 is 232041.

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

53843025681 is a `hidden beast` number, since 5 + 3 + 84 + 3 + 0 + 2 + 568 + 1 = 666.

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

It is not a de Polignac number, because 53843025681 - 2⁹ = 53843025169 is a prime.

It is a super-2 number, since 2×53843025681² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53843025601) 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 8 ways as a sum of consecutive naturals, for example, 657450 + ... + 734796.

Almost surely, 2^53843025681 is an apocalyptic number.

53843025681 is the 232041-st square number.

53843025681 is the 116021-st centered octagonal number.

It is an amenable number.

53843025681 is a deficient number, since it is larger than the sum of its proper divisors (23931239160).

53843025681 is an frugal number, since it uses more digits than its factorization.

53843025681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154700 (or 77350 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 53843025681 in words is "fifty-three billion, eight hundred forty-three million, twenty-five thousand, six hundred eighty-one".