64755856 has 80 divisors (see below), whose sum is σ = 151383168. Its totient is φ = 26470400.

The previous prime is 64755797. The next prime is 64755871. The reversal of 64755856 is 65855746.

It is a Harshad number since it is a multiple of its sum of digits (46).

Its product of digits (1008000) is a multiple of the sum of its prime factors (1000).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68346 + ... + 69286.

Almost surely, 2^64755856 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 64755856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75691584).

64755856 is an abundant number, since it is smaller than the sum of its proper divisors (86627312).

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

64755856 is a wasteful number, since it uses less digits than its factorization.

64755856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000 (or 994 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 46.

The square root of 64755856 is about 8047.1023356237. The cubic root of 64755856 is about 401.5685411568.

The spelling of 64755856 in words is "sixty-four million, seven hundred fifty-five thousand, eight hundred fifty-six".