1636143412 has 12 divisors (see below), whose sum is σ = 2863552356. Its totient is φ = 817985600.

The previous prime is 1636143407. The next prime is 1636143419. The reversal of 1636143412 is 2143416361.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1315948176 + 320195236 = 36276^2 + 17894^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636143419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42162 + ... + 71062.

It is an arithmetic number, because the mean of its divisors is an integer number (238629363).

Almost surely, 2^1636143412 is an apocalyptic number.

It is an amenable number.

1636143412 is a deficient number, since it is larger than the sum of its proper divisors (1227408944).

1636143412 is a wasteful number, since it uses less digits than its factorization.

1636143412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43058 (or 43056 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 1636143412 is about 40449.2696102167. The cubic root of 1636143412 is about 1178.3485977366.

Adding to 1636143412 its reverse (2143416361), we get a palindrome (3779559773).

The spelling of 1636143412 in words is "one billion, six hundred thirty-six million, one hundred forty-three thousand, four hundred twelve".