36646261 has 4 divisors (see below), whose sum is σ = 36836332. Its totient is φ = 36456192.

The previous prime is 36646249. The next prime is 36646279. The reversal of 36646261 is 16264663.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16264663 = 151 ⋅107713.

It can be written as a sum of positive squares in 2 ways, for example, as 24354225 + 12292036 = 4935^2 + 3506^2 .

It is a cyclic number.

It is not a de Polignac number, because 36646261 - 2¹⁹ = 36121973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36646201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94746 + ... + 95131.

It is an arithmetic number, because the mean of its divisors is an integer number (9209083).

Almost surely, 2^36646261 is an apocalyptic number.

It is an amenable number.

36646261 is a deficient number, since it is larger than the sum of its proper divisors (190071).

36646261 is a wasteful number, since it uses less digits than its factorization.

36646261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190070.

The product of its digits is 31104, while the sum is 34.

The square root of 36646261 is about 6053.6155312342. The cubic root of 36646261 is about 332.1568578234.

The spelling of 36646261 in words is "thirty-six million, six hundred forty-six thousand, two hundred sixty-one".