64261856 has 48 divisors (see below), whose sum is σ = 130319280. Its totient is φ = 31180800.

The previous prime is 64261849. The next prime is 64261867. The reversal of 64261856 is 65816246.

64261856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×64261856² = 8259172273129472, which contains 22 as substring.

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, 190520 + ... + 190856.

It is an arithmetic number, because the mean of its divisors is an integer number (2714985).

Almost surely, 2^64261856 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 64261856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65159640).

64261856 is an abundant number, since it is smaller than the sum of its proper divisors (66057424).

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

64261856 is a wasteful number, since it uses less digits than its factorization.

64261856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507 (or 499 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 64261856 is about 8016.3492937870. The cubic root of 64261856 is about 400.5447910034.

The spelling of 64261856 in words is "sixty-four million, two hundred sixty-one thousand, eight hundred fifty-six".