201008645 has 8 divisors (see below), whose sum is σ = 242544120. Its totient is φ = 159917760.

The previous prime is 201008641. The next prime is 201008671. The reversal of 201008645 is 546800102.

It can be written as a sum of positive squares in 4 ways, for example, as 1803649 + 199204996 = 1343^2 + 14114^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 201008645 - 2² = 201008641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201008641) 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, 110150 + ... + 111959.

It is an arithmetic number, because the mean of its divisors is an integer number (30318015).

Almost surely, 2^201008645 is an apocalyptic number.

It is an amenable number.

201008645 is a deficient number, since it is larger than the sum of its proper divisors (41535475).

201008645 is a wasteful number, since it uses less digits than its factorization.

201008645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222295.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 201008645 is about 14177.7517611221. The cubic root of 201008645 is about 585.7849982188.

Adding to 201008645 its reverse (546800102), we get a palindrome (747808747).

The spelling of 201008645 in words is "two hundred one million, eight thousand, six hundred forty-five".