61644032 has 18 divisors (see below), whose sum is σ = 123047778. Its totient is φ = 30821888.

The previous prime is 61644029. The next prime is 61644041. The reversal of 61644032 is 23044616.

It can be written as a sum of positive squares in only one way, i.e., 48219136 + 13424896 = 6944^2 + 3664^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61643992 and 61644010.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120143 + ... + 120654.

Almost surely, 2^61644032 is an apocalyptic number.

It is an amenable number.

61644032 is a deficient number, since it is larger than the sum of its proper divisors (61403746).

61644032 is an equidigital number, since it uses as much as digits as its factorization.

61644032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240813 (or 240799 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 61644032 is about 7851.3713451855. The cubic root of 61644032 is about 395.0302428374.

Adding to 61644032 its reverse (23044616), we get a palindrome (84688648).

The spelling of 61644032 in words is "sixty-one million, six hundred forty-four thousand, thirty-two".