6644452500 has 180 divisors, whose sum is σ = 23986746784. Its totient is φ = 1518696000.

The previous prime is 6644452483. The next prime is 6644452517. The reversal of 6644452500 is 52544466.

6644452500 is a `hidden beast` number, since 6 + 64 + 44 + 52 + 500 = 666.

It is an interprime number because it is at equal distance from previous prime (6644452483) and next prime (6644452517).

It is a tau number, because it is divible by the number of its divisors (180).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 136407 + ... + 178593.

Almost surely, 2^6644452500 is an apocalyptic number.

6644452500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6644452500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11993373392).

6644452500 is an abundant number, since it is smaller than the sum of its proper divisors (17342294284).

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

6644452500 is a wasteful number, since it uses less digits than its factorization.

6644452500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42224 (or 42204 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The square root of 6644452500 is about 81513.5111499928. The cubic root of 6644452500 is about 1879.9792984743.

Adding to 6644452500 its reverse (52544466), we get a palindrome (6696996966).

The spelling of 6644452500 in words is "six billion, six hundred forty-four million, four hundred fifty-two thousand, five hundred".