6645253496 has 192 divisors, whose sum is σ = 15881644800. Its totient is φ = 2545551360.

The previous prime is 6645253469. The next prime is 6645253499. The reversal of 6645253496 is 6943525466.

It is a super-2 number, since 2×6645253496² = 88318788052200444032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6645253499) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 68507720 + ... + 68507816.

It is an arithmetic number, because the mean of its divisors is an integer number (82716900).

Almost surely, 2^6645253496 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6645253496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7940822400).

6645253496 is an abundant number, since it is smaller than the sum of its proper divisors (9236391304).

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

6645253496 is a wasteful number, since it uses less digits than its factorization.

6645253496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 223 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 50.

The square root of 6645253496 is about 81518.4242732893. The cubic root of 6645253496 is about 1880.0548399576.

The spelling of 6645253496 in words is "six billion, six hundred forty-five million, two hundred fifty-three thousand, four hundred ninety-six".