64245556 has 24 divisors (see below), whose sum is σ = 116854920. Its totient is φ = 30868992.

The previous prime is 64245551. The next prime is 64245589. The reversal of 64245556 is 65554246.

It can be written as a sum of positive squares in 4 ways, for example, as 2371600 + 61873956 = 1540^2 + 7866^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64245551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25840 + ... + 28216.

It is an arithmetic number, because the mean of its divisors is an integer number (4868955).

Almost surely, 2^64245556 is an apocalyptic number.

It is an amenable number.

64245556 is a deficient number, since it is larger than the sum of its proper divisors (52609364).

64245556 is a wasteful number, since it uses less digits than its factorization.

64245556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643 (or 2641 counting only the distinct ones).

The product of its digits is 144000, while the sum is 37.

The square root of 64245556 is about 8015.3325570434. The cubic root of 64245556 is about 400.5109221186.

The spelling of 64245556 in words is "sixty-four million, two hundred forty-five thousand, five hundred fifty-six".