201649449 has 8 divisors (see below), whose sum is σ = 269382112. Its totient is φ = 134174880.

The previous prime is 201649423. The next prime is 201649453. The reversal of 201649449 is 944946102.

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

It is not a de Polignac number, because 201649449 - 2¹⁶ = 201583913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201649549) 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, 62692 + ... + 65829.

It is an arithmetic number, because the mean of its divisors is an integer number (33672764).

Almost surely, 2^201649449 is an apocalyptic number.

It is an amenable number.

201649449 is a deficient number, since it is larger than the sum of its proper divisors (67732663).

201649449 is a wasteful number, since it uses less digits than its factorization.

201649449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129047.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 201649449 is about 14200.3327073699. The cubic root of 201649449 is about 586.4068208696.

The spelling of 201649449 in words is "two hundred one million, six hundred forty-nine thousand, four hundred forty-nine".