36561761 has 4 divisors (see below), whose sum is σ = 36897300. Its totient is φ = 36226224.

The previous prime is 36561731. The next prime is 36561773. The reversal of 36561761 is 16716563.

It is a happy number.

36561761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16716563 = 37 ⋅451799.

It can be written as a sum of positive squares in 2 ways, for example, as 31584400 + 4977361 = 5620^2 + 2231^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36561761 is a prime.

It is a super-2 number, since 2×36561761² = 2673524734842242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36561731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167606 + ... + 167823.

It is an arithmetic number, because the mean of its divisors is an integer number (9224325).

Almost surely, 2^36561761 is an apocalyptic number.

It is an amenable number.

36561761 is a deficient number, since it is larger than the sum of its proper divisors (335539).

36561761 is a wasteful number, since it uses less digits than its factorization.

36561761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335538.

The product of its digits is 22680, while the sum is 35.

The square root of 36561761 is about 6046.6322031359. The cubic root of 36561761 is about 331.9013624090.

It can be divided in two parts, 365 and 61761, that added together give a palindrome (62126).

The spelling of 36561761 in words is "thirty-six million, five hundred sixty-one thousand, seven hundred sixty-one".