64445760 has 112 divisors (see below), whose sum is σ = 227380800. Its totient is φ = 17183232.

The previous prime is 64445753. The next prime is 64445767. The reversal of 64445760 is 6754446.

64445760 is a `hidden beast` number, since 644 + 4 + 5 + 7 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (64445753) and next prime (64445767).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64445767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4911 + ... + 12369.

Almost surely, 2^64445760 is an apocalyptic number.

64445760 is a gapful number since it is divisible by the number (60) 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 64445760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113690400).

64445760 is an abundant number, since it is smaller than the sum of its proper divisors (162935040).

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

64445760 is a wasteful number, since it uses less digits than its factorization.

64445760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7485 (or 7469 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The square root of 64445760 is about 8027.8116569835. The cubic root of 64445760 is about 400.9265189164.

The spelling of 64445760 in words is "sixty-four million, four hundred forty-five thousand, seven hundred sixty".