64531508 has 6 divisors (see below), whose sum is σ = 112930146. Its totient is φ = 32265752.

The previous prime is 64531501. The next prime is 64531531. The reversal of 64531508 is 80513546.

It is a happy number.

64531508 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 59567524 + 4963984 = 7718^2 + 2228^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64531501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8066435 + ... + 8066442.

It is an arithmetic number, because the mean of its divisors is an integer number (18821691).

Almost surely, 2^64531508 is an apocalyptic number.

It is an amenable number.

64531508 is a deficient number, since it is larger than the sum of its proper divisors (48398638).

64531508 is a wasteful number, since it uses less digits than its factorization.

64531508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16132881 (or 16132879 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 64531508 is about 8033.1505650025. The cubic root of 64531508 is about 401.1042570689.

The spelling of 64531508 in words is "sixty-four million, five hundred thirty-one thousand, five hundred eight".