61643232 has 72 divisors (see below), whose sum is σ = 200347056. Its totient is φ = 17611776.

The previous prime is 61643191. The next prime is 61643297. The reversal of 61643232 is 23234616.

61643232 is a `hidden beast` number, since 616 + 43 + 2 + 3 + 2 = 666.

61643232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (72).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 61643196 and 61643205.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 13273 + ... + 17304.

It is an arithmetic number, because the mean of its divisors is an integer number (2782598).

Almost surely, 2^61643232 is an apocalyptic number.

It is an amenable number.

61643232 is an abundant number, since it is smaller than the sum of its proper divisors (138703824).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61643232 is a wasteful number, since it uses less digits than its factorization.

61643232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30600 (or 30589 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 61643232 is about 7851.3203985062. The cubic root of 61643232 is about 395.0285339639.

Adding to 61643232 its reverse (23234616), we get a palindrome (84877848).

The spelling of 61643232 in words is "sixty-one million, six hundred forty-three thousand, two hundred thirty-two".