64881032 has 8 divisors (see below), whose sum is σ = 121651950. Its totient is φ = 32440512.

The previous prime is 64881001. The next prime is 64881043. The reversal of 64881032 is 23018846.

It can be written as a sum of positive squares in only one way, i.e., 64096036 + 784996 = 8006^2 + 886^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 64881032.

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 as a sum of consecutive naturals, namely, 4055057 + ... + 4055072.

Almost surely, 2^64881032 is an apocalyptic number.

It is an amenable number.

64881032 is a deficient number, since it is larger than the sum of its proper divisors (56770918).

64881032 is a wasteful number, since it uses less digits than its factorization.

64881032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8110135 (or 8110131 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 64881032 is about 8054.8762870698. The cubic root of 64881032 is about 401.8271246644.

Adding to 64881032 its reverse (23018846), we get a palindrome (87899878).

The spelling of 64881032 in words is "sixty-four million, eight hundred eighty-one thousand, thirty-two".