1641078201 has 16 divisors (see below), whose sum is σ = 2518948224. Its totient is φ = 930912384.

The previous prime is 1641078191. The next prime is 1641078223. The reversal of 1641078201 is 1028701461.

It is not a de Polignac number, because 1641078201 - 2⁶ = 1641078137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1641078001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282330 + ... + 288083.

It is an arithmetic number, because the mean of its divisors is an integer number (157434264).

Almost surely, 2^1641078201 is an apocalyptic number.

It is an amenable number.

1641078201 is a deficient number, since it is larger than the sum of its proper divisors (877870023).

1641078201 is a wasteful number, since it uses less digits than its factorization.

1641078201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570560.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 1641078201 is about 40510.2234133558. The cubic root of 1641078201 is about 1179.5320851383.

Adding to 1641078201 its reverse (1028701461), we get a palindrome (2669779662).

The spelling of 1641078201 in words is "one billion, six hundred forty-one million, seventy-eight thousand, two hundred one".