64205461 has 4 divisors (see below), whose sum is σ = 64674252. Its totient is φ = 63736672.

The previous prime is 64205437. The next prime is 64205483. The reversal of 64205461 is 16450246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20566225 + 43639236 = 4535^2 + 6606^2 .

It is a cyclic number.

It is not a de Polignac number, because 64205461 - 2⁵ = 64205429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64205411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234190 + ... + 234463.

It is an arithmetic number, because the mean of its divisors is an integer number (16168563).

Almost surely, 2^64205461 is an apocalyptic number.

It is an amenable number.

64205461 is a deficient number, since it is larger than the sum of its proper divisors (468791).

64205461 is a wasteful number, since it uses less digits than its factorization.

64205461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468790.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 64205461 is about 8012.8310228034. The cubic root of 64205461 is about 400.4275865116.

It can be divided in two parts, 6420 and 5461, that added together give a square (11881 = 109²).

The spelling of 64205461 in words is "sixty-four million, two hundred five thousand, four hundred sixty-one".