64943964 has 24 divisors (see below), whose sum is σ = 168373520. Its totient is φ = 21647952.

The previous prime is 64943947. The next prime is 64943969. The reversal of 64943964 is 46934946.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64943969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 300559 + ... + 300774.

Almost surely, 2^64943964 is an apocalyptic number.

It is an amenable number.

64943964 is an abundant number, since it is smaller than the sum of its proper divisors (103429556).

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

64943964 is a wasteful number, since it uses less digits than its factorization.

64943964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601346 (or 601338 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 64943964 is about 8058.7817937949. The cubic root of 64943964 is about 401.9570014157.

The spelling of 64943964 in words is "sixty-four million, nine hundred forty-three thousand, nine hundred sixty-four".