1644242202 has 12 divisors (see below), whose sum is σ = 3562524810. Its totient is φ = 548080728.

The previous prime is 1644242189. The next prime is 1644242221. The reversal of 1644242202 is 2022424461.

1644242202 is a `hidden beast` number, since 16 + 4 + 424 + 220 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 915728121 + 728514081 = 30261^2 + 26991^2 .

It is a super-3 number, since 3×1644242202³ (a number of 29 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45673377 + ... + 45673412.

Almost surely, 2^1644242202 is an apocalyptic number.

1644242202 is an abundant number, since it is smaller than the sum of its proper divisors (1918282608).

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

1644242202 is a wasteful number, since it uses less digits than its factorization.

1644242202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91346797 (or 91346794 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

The square root of 1644242202 is about 40549.2564913341. The cubic root of 1644242202 is about 1180.2896449751.

Adding to 1644242202 its reverse (2022424461), we get a palindrome (3666666663).

The spelling of 1644242202 in words is "one billion, six hundred forty-four million, two hundred forty-two thousand, two hundred two".