1968621201 has 12 divisors (see below), whose sum is σ = 2844486580. Its totient is φ = 1311988320.

The previous prime is 1968621167. The next prime is 1968621209. The reversal of 1968621201 is 1021268691.

1968621201 is a `hidden beast` number, since 1 + 9 + 6 + 8 + 621 + 20 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 900900225 + 1067720976 = 30015^2 + 32676^2 .

It is not a de Polignac number, because 1968621201 - 2¹¹ = 1968619153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1968621209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4810 + ... + 62931.

Almost surely, 2^1968621201 is an apocalyptic number.

It is an amenable number.

1968621201 is a deficient number, since it is larger than the sum of its proper divisors (875865379).

1968621201 is a wasteful number, since it uses less digits than its factorization.

1968621201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70976 (or 70973 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 1968621201 is about 44369.1469492033. The cubic root of 1968621201 is about 1253.2971515997.

Adding to 1968621201 its reverse (1021268691), we get a palindrome (2989889892).

The spelling of 1968621201 in words is "one billion, nine hundred sixty-eight million, six hundred twenty-one thousand, two hundred one".