64557044 has 18 divisors (see below), whose sum is σ = 118104210. Its totient is φ = 30874096.

The previous prime is 64557029. The next prime is 64557047. The reversal of 64557044 is 44075546.

It can be written as a sum of positive squares in only one way, i.e., 33062500 + 31494544 = 5750^2 + 5612^2 .

It is a super-2 number, since 2×64557044² = 8335223860035872, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64556995 and 64557013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64557047) 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, 13139 + ... + 17370.

It is an arithmetic number, because the mean of its divisors is an integer number (6561345).

Almost surely, 2^64557044 is an apocalyptic number.

It is an amenable number.

64557044 is a deficient number, since it is larger than the sum of its proper divisors (53547166).

64557044 is a wasteful number, since it uses less digits than its factorization.

64557044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30559 (or 30534 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 64557044 is about 8034.7398215499. The cubic root of 64557044 is about 401.1571575712.

The spelling of 64557044 in words is "sixty-four million, five hundred fifty-seven thousand, forty-four".