1641278212 has 24 divisors (see below), whose sum is σ = 3283793856. Its totient is φ = 703139808.

The previous prime is 1641278201. The next prime is 1641278213. The reversal of 1641278212 is 2128721461.

It is not an unprimeable number, because it can be changed into a prime (1641278213) 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, 76818 + ... + 95830.

It is an arithmetic number, because the mean of its divisors is an integer number (136824744).

Almost surely, 2^1641278212 is an apocalyptic number.

It is an amenable number.

1641278212 is an abundant number, since it is smaller than the sum of its proper divisors (1642515644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1641278212 is a wasteful number, since it uses less digits than its factorization.

1641278212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22107 (or 22105 counting only the distinct ones).

The product of its digits is 10752, while the sum is 34.

The square root of 1641278212 is about 40512.6919865861. The cubic root of 1641278212 is about 1179.5800027833.

Adding to 1641278212 its reverse (2128721461), we get a palindrome (3769999673).

The spelling of 1641278212 in words is "one billion, six hundred forty-one million, two hundred seventy-eight thousand, two hundred twelve".