64943856 has 50 divisors (see below), whose sum is σ = 187970112. Its totient is φ = 21647520.

The previous prime is 64943821. The next prime is 64943873. The reversal of 64943856 is 65834946.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 23760 + ... + 26351.

Almost surely, 2^64943856 is an apocalyptic number.

It is an amenable number.

64943856 is an abundant number, since it is smaller than the sum of its proper divisors (123026256).

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

64943856 is a wasteful number, since it uses less digits than its factorization.

64943856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50131 (or 50116 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 64943856 is about 8058.7750930275. The cubic root of 64943856 is about 401.9567786011.

The spelling of 64943856 in words is "sixty-four million, nine hundred forty-three thousand, eight hundred fifty-six".