61643432 has 16 divisors (see below), whose sum is σ = 115668000. Its totient is φ = 30798640.

The previous prime is 61643423. The next prime is 61643471. The reversal of 61643432 is 23434616.

61643432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 61643395 and 61643404.

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 3 ways as a sum of consecutive naturals, for example, 14957 + ... + 18627.

It is an arithmetic number, because the mean of its divisors is an integer number (7229250).

Almost surely, 2^61643432 is an apocalyptic number.

It is an amenable number.

61643432 is a deficient number, since it is larger than the sum of its proper divisors (54024568).

61643432 is a wasteful number, since it uses less digits than its factorization.

61643432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5776 (or 5772 counting only the distinct ones).

The product of its digits is 10368, while the sum is 29.

The square root of 61643432 is about 7851.3331352070. Note that the first 3 decimals coincide. The cubic root of 61643432 is about 395.0289611837.

The spelling of 61643432 in words is "sixty-one million, six hundred forty-three thousand, four hundred thirty-two".