6646276312500 has 672 divisors, whose sum is σ = 21608723404800. Its totient is φ = 1576512000000.

The previous prime is 6646276312477. The next prime is 6646276312513. The reversal of 6646276312500 is 52136726466.

It is a self number, because there is not a number n which added to its sum of digits gives 6646276312500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 27808687381 + ... + 27808687619.

It is an arithmetic number, because the mean of its divisors is an integer number (32155838400).

Almost surely, 2^{6646276312500} is an apocalyptic number.

6646276312500 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 6646276312500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10804361702400).

6646276312500 is an abundant number, since it is smaller than the sum of its proper divisors (14962447092300).

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

6646276312500 is a wasteful number, since it uses less digits than its factorization.

6646276312500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 523 (or 496 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 48.

The spelling of 6646276312500 in words is "six trillion, six hundred forty-six billion, two hundred seventy-six million, three hundred twelve thousand, five hundred".