6644612152 has 16 divisors (see below), whose sum is σ = 12748384440. Its totient is φ = 3245042976.

The previous prime is 6644612131. The next prime is 6644612159. The reversal of 6644612152 is 2512164466.

It is a super-2 number, since 2×6644612152² = 88301741301012142208, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644612159) 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, 9657523 + ... + 9658210.

Almost surely, 2^6644612152 is an apocalyptic number.

It is an amenable number.

6644612152 is a deficient number, since it is larger than the sum of its proper divisors (6103772288).

6644612152 is a wasteful number, since it uses less digits than its factorization.

6644612152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19315782 (or 19315778 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 6644612152 is about 81514.4904418840. The cubic root of 6644612152 is about 1879.9943556493.

The spelling of 6644612152 in words is "six billion, six hundred forty-four million, six hundred twelve thousand, one hundred fifty-two".