1636364144 has 20 divisors (see below), whose sum is σ = 3180466824. Its totient is φ = 815598528.

The previous prime is 1636364143. The next prime is 1636364287. The reversal of 1636364144 is 4414636361.

It is a happy number.

It is a super-2 number, since 2×1636364144² = 5355375223537705472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1636364098 and 1636364107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1636364143) 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, 156242 + ... + 166385.

Almost surely, 2^1636364144 is an apocalyptic number.

It is an amenable number.

1636364144 is a deficient number, since it is larger than the sum of its proper divisors (1544102680).

1636364144 is a wasteful number, since it uses less digits than its factorization.

1636364144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322952 (or 322946 counting only the distinct ones).

The product of its digits is 124416, while the sum is 38.

The square root of 1636364144 is about 40451.9980223474. The cubic root of 1636364144 is about 1178.4015856644.

The spelling of 1636364144 in words is "one billion, six hundred thirty-six million, three hundred sixty-four thousand, one hundred forty-four".