64551572 has 6 divisors (see below), whose sum is σ = 112965258. Its totient is φ = 32275784.

The previous prime is 64551551. The next prime is 64551577. The reversal of 64551572 is 27515546.

It can be written as a sum of positive squares in only one way, i.e., 32787076 + 31764496 = 5726^2 + 5636^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64551577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8068943 + ... + 8068950.

It is an arithmetic number, because the mean of its divisors is an integer number (18827543).

Almost surely, 2^64551572 is an apocalyptic number.

It is an amenable number.

64551572 is a deficient number, since it is larger than the sum of its proper divisors (48413686).

64551572 is a wasteful number, since it uses less digits than its factorization.

64551572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16137897 (or 16137895 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 64551572 is about 8034.3992930399. The cubic root of 64551572 is about 401.1458229238.

The spelling of 64551572 in words is "sixty-four million, five hundred fifty-one thousand, five hundred seventy-two".