236117274561 has 81 divisors (see below), whose sum is σ = 412460902659. Its totient is φ = 134766719136.

The previous prime is 236117274559. The next prime is 236117274577. The reversal of 236117274561 is 165472711632.

The square root of 236117274561 is 485919.

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

236117274561 is a `hidden beast` number, since 2 + 3 + 6 + 1 + 17 + 2 + 74 + 561 = 666.

It can be written as a sum of positive squares in only one way, i.e., 218813450625 + 17303823936 = 467775^2 + 131544^2 .

It is a tau number, because it is divible by the number of its divisors (81).

It is not a de Polignac number, because 236117274561 - 2¹ = 236117274559 is a prime.

It is a super-2 number, since 2×236117274561² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (236117274521) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 275515645 + ... + 275516501.

Almost surely, 2^236117274561 is an apocalyptic number.

236117274561 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

236117274561 is the 485919-th square number.

236117274561 is the 242960-th centered octagonal number.

It is an amenable number.

236117274561 is a deficient number, since it is larger than the sum of its proper divisors (176343628098).

236117274561 is an frugal number, since it uses more digits than its factorization.

236117274561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1752 (or 867 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The spelling of 236117274561 in words is "two hundred thirty-six billion, one hundred seventeen million, two hundred seventy-four thousand, five hundred sixty-one".