64091856 has 80 divisors (see below), whose sum is σ = 175613760. Its totient is φ = 20106240.

The previous prime is 64091843. The next prime is 64091899. The reversal of 64091856 is 65819046.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56511 + ... + 57633.

It is an arithmetic number, because the mean of its divisors is an integer number (2195172).

Almost surely, 2^64091856 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 64091856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87806880).

64091856 is an abundant number, since it is smaller than the sum of its proper divisors (111521904).

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

64091856 is a wasteful number, since it uses less digits than its factorization.

64091856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 64091856 is about 8005.7389415344. The cubic root of 64091856 is about 400.1912751866.

The spelling of 64091856 in words is "sixty-four million, ninety-one thousand, eight hundred fifty-six".