64795640 has 96 divisors (see below), whose sum is σ = 182710080. Its totient is φ = 20498688.

The previous prime is 64795637. The next prime is 64795651. The reversal of 64795640 is 4659746.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24209 + ... + 26751.

It is an arithmetic number, because the mean of its divisors is an integer number (1903230).

Almost surely, 2^64795640 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 64795640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91355040).

64795640 is an abundant number, since it is smaller than the sum of its proper divisors (117914440).

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

64795640 is a wasteful number, since it uses less digits than its factorization.

64795640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2581 (or 2570 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 64795640 is about 8049.5739017665. The cubic root of 64795640 is about 401.6507614285.

The spelling of 64795640 in words is "sixty-four million, seven hundred ninety-five thousand, six hundred forty".