64041561 has 12 divisors (see below), whose sum is σ = 95005092. Its totient is φ = 41540256.

The previous prime is 64041557. The next prime is 64041563. The reversal of 64041561 is 16514046.

64041561 is a `hidden beast` number, since 64 + 0 + 41 + 561 = 666.

64041561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 36542025 + 27499536 = 6045^2 + 5244^2 .

It is not a de Polignac number, because 64041561 - 2² = 64041557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64041563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95826 + ... + 96491.

It is an arithmetic number, because the mean of its divisors is an integer number (7917091).

Almost surely, 2^64041561 is an apocalyptic number.

It is an amenable number.

64041561 is a deficient number, since it is larger than the sum of its proper divisors (30963531).

64041561 is a wasteful number, since it uses less digits than its factorization.

64041561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192360 (or 192357 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 64041561 is about 8002.5971409287. The cubic root of 64041561 is about 400.0865666808.

The spelling of 64041561 in words is "sixty-four million, forty-one thousand, five hundred sixty-one".