64681472 has 80 divisors (see below), whose sum is σ = 139537200. Its totient is φ = 29859840.

The previous prime is 64681459. The next prime is 64681483. The reversal of 64681472 is 27418646.

64681472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (38).

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 7 ways as a sum of consecutive naturals, for example, 593354 + ... + 593462.

It is an arithmetic number, because the mean of its divisors is an integer number (1744215).

Almost surely, 2^64681472 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 64681472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69768600).

64681472 is an abundant number, since it is smaller than the sum of its proper divisors (74855728).

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

64681472 is a wasteful number, since it uses less digits than its factorization.

64681472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 191 counting only the distinct ones).

The product of its digits is 64512, while the sum is 38.

The square root of 64681472 is about 8042.4792197431. The cubic root of 64681472 is about 401.4147238256.

It can be divided in two parts, 64 and 681472, that multiplied together give a cube (43614208 = 352³).

The spelling of 64681472 in words is "sixty-four million, six hundred eighty-one thousand, four hundred seventy-two".