64471632 has 80 divisors (see below), whose sum is σ = 171780672. Its totient is φ = 20828160.

The previous prime is 64471619. The next prime is 64471643. The reversal of 64471632 is 23617446.

It is a happy number.

64471632 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 = 64471593 and 64471602.

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 15 ways as a sum of consecutive naturals, for example, 283903 + ... + 284129.

Almost surely, 2^64471632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64471632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85890336).

64471632 is an abundant number, since it is smaller than the sum of its proper divisors (107309040).

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

64471632 is a wasteful number, since it uses less digits than its factorization.

64471632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396 (or 390 counting only the distinct ones).

The product of its digits is 24192, while the sum is 33.

The square root of 64471632 is about 8029.4228933342. The cubic root of 64471632 is about 400.9801629066.

The spelling of 64471632 in words is "sixty-four million, four hundred seventy-one thousand, six hundred thirty-two".