64230561 has 6 divisors (see below), whose sum is σ = 92777490. Its totient is φ = 42820368.

The previous prime is 64230553. The next prime is 64230571. The reversal of 64230561 is 16503246.

It can be written as a sum of positive squares in only one way, i.e., 45360225 + 18870336 = 6735^2 + 4344^2 .

It is not a de Polignac number, because 64230561 - 2³ = 64230553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64230511) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 3568356 + ... + 3568373.

It is an arithmetic number, because the mean of its divisors is an integer number (15462915).

Almost surely, 2^64230561 is an apocalyptic number.

It is an amenable number.

64230561 is a deficient number, since it is larger than the sum of its proper divisors (28546929).

64230561 is a wasteful number, since it uses less digits than its factorization.

64230561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136735 (or 7136732 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 64230561 is about 8014.3971077056. The cubic root of 64230561 is about 400.4797597630.

The spelling of 64230561 in words is "sixty-four million, two hundred thirty thousand, five hundred sixty-one".