52536765681 has 9 divisors (see below), whose sum is σ = 75887432569. Its totient is φ = 35024052036.

The previous prime is 52536765629. The next prime is 52536765733. The reversal of 52536765681 is 18656763525.

It is a happy number.

The square root of 52536765681 is 229209.

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

52536765681 is a `hidden beast` number, since 5 + 2 + 5 + 3 + 6 + 76 + 568 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (52536765629) and next prime (52536765733).

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

It is not a de Polignac number, because 52536765681 - 2¹⁷ = 52536634609 is a prime.

It is a super-2 number, since 2×52536765681² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52536761681) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 649426 + ... + 725828.

Almost surely, 2^52536765681 is an apocalyptic number.

52536765681 is the 229209-th square number.

52536765681 is the 114605-th centered octagonal number.

It is an amenable number.

52536765681 is a deficient number, since it is larger than the sum of its proper divisors (23350666888).

52536765681 is an frugal number, since it uses more digits than its factorization.

52536765681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152812 (or 76406 counting only the distinct ones).

The product of its digits is 9072000, while the sum is 54.

The spelling of 52536765681 in words is "fifty-two billion, five hundred thirty-six million, seven hundred sixty-five thousand, six hundred eighty-one".