61646223 has 4 divisors (see below), whose sum is σ = 82194968. Its totient is φ = 41097480.

The previous prime is 61646201. The next prime is 61646239. The reversal of 61646223 is 32264616.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 61646223 - 2⁵ = 61646191 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 (61646243) 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, 10274368 + ... + 10274373.

It is an arithmetic number, because the mean of its divisors is an integer number (20548742).

Almost surely, 2^61646223 is an apocalyptic number.

61646223 is a deficient number, since it is larger than the sum of its proper divisors (20548745).

61646223 is a wasteful number, since it uses less digits than its factorization.

61646223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20548744.

The product of its digits is 10368, while the sum is 30.

The square root of 61646223 is about 7851.5108737109. The cubic root of 61646223 is about 395.0349229391.

The spelling of 61646223 in words is "sixty-one million, six hundred forty-six thousand, two hundred twenty-three".