64551473 has 6 divisors (see below), whose sum is σ = 75090546. Its totient is φ = 55329792.

The previous prime is 64551469. The next prime is 64551497. The reversal of 64551473 is 37415546.

It can be written as a sum of positive squares in only one way, i.e., 33269824 + 31281649 = 5768^2 + 5593^2 .

It is not a de Polignac number, because 64551473 - 2² = 64551469 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64551173) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 658640 + ... + 658737.

It is an arithmetic number, because the mean of its divisors is an integer number (12515091).

Almost surely, 2^64551473 is an apocalyptic number.

It is an amenable number.

64551473 is a deficient number, since it is larger than the sum of its proper divisors (10539073).

64551473 is a wasteful number, since it uses less digits than its factorization.

64551473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1317391 (or 1317384 counting only the distinct ones).

The product of its digits is 50400, while the sum is 35.

The square root of 64551473 is about 8034.3931320293. The cubic root of 64551473 is about 401.1456178503.

The spelling of 64551473 in words is "sixty-four million, five hundred fifty-one thousand, four hundred seventy-three".