64905472 has 18 divisors (see below), whose sum is σ = 129557918. Its totient is φ = 32452608.

The previous prime is 64905461. The next prime is 64905479. The reversal of 64905472 is 27450946.

It can be written as a sum of positive squares in only one way, i.e., 40144896 + 24760576 = 6336^2 + 4976^2 .

It is not an unprimeable number, because it can be changed into a prime (64905479) by changing a digit.

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, 126513 + ... + 127024.

Almost surely, 2^64905472 is an apocalyptic number.

It is an amenable number.

64905472 is a deficient number, since it is larger than the sum of its proper divisors (64652446).

64905472 is an equidigital number, since it uses as much as digits as its factorization.

64905472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253553 (or 253539 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 64905472 is about 8056.3932376716. The cubic root of 64905472 is about 401.8775730095.

The spelling of 64905472 in words is "sixty-four million, nine hundred five thousand, four hundred seventy-two".