64556632 has 64 divisors (see below), whose sum is σ = 146442240. Its totient is φ = 26092800.

The previous prime is 64556629. The next prime is 64556641. The reversal of 64556632 is 23665546.

64556632 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 = 64556591 and 64556600.

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, 70723 + ... + 71629.

It is an arithmetic number, because the mean of its divisors is an integer number (2288160).

Almost surely, 2^64556632 is an apocalyptic number.

64556632 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64556632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73221120).

64556632 is an abundant number, since it is smaller than the sum of its proper divisors (81885608).

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

64556632 is a wasteful number, since it uses less digits than its factorization.

64556632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 992 (or 988 counting only the distinct ones).

The product of its digits is 129600, while the sum is 37.

The square root of 64556632 is about 8034.7141828443. The cubic root of 64556632 is about 401.1563041807.

The spelling of 64556632 in words is "sixty-four million, five hundred fifty-six thousand, six hundred thirty-two".