64509472 has 12 divisors (see below), whose sum is σ = 127003086. Its totient is φ = 32254720.

The previous prime is 64509461. The next prime is 64509491. The reversal of 64509472 is 27490546.

It can be written as a sum of positive squares in only one way, i.e., 58920976 + 5588496 = 7676^2 + 2364^2 .

It is a super-2 number, since 2×64509472² = 8322943955437568, which contains 22 as substring.

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, 1007929 + ... + 1007992.

Almost surely, 2^64509472 is an apocalyptic number.

It is an amenable number.

64509472 is a deficient number, since it is larger than the sum of its proper divisors (62493614).

64509472 is a wasteful number, since it uses less digits than its factorization.

64509472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015931 (or 2015923 counting only the distinct ones).

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

The square root of 64509472 is about 8031.7788814185. The cubic root of 64509472 is about 401.0585959650.

The spelling of 64509472 in words is "sixty-four million, five hundred nine thousand, four hundred seventy-two".