646593232326720 has 448 divisors, whose sum is σ = 2351396586479616. Its totient is φ = 147466104422400.

The previous prime is 646593232326661. The next prime is 646593232326787. The reversal of 646593232326720 is 27623232395646.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 29293389604 + ... + 29293411676.

Almost surely, 2^{646593232326720} is an apocalyptic number.

646593232326720 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 646593232326720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175698293239808).

646593232326720 is an abundant number, since it is smaller than the sum of its proper divisors (1704803354152896).

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

646593232326720 is a wasteful number, since it uses less digits than its factorization.

646593232326720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31538 (or 31528 counting only the distinct ones).

The product of its (nonzero) digits is 117573120, while the sum is 60.

The spelling of 646593232326720 in words is "six hundred forty-six trillion, five hundred ninety-three billion, two hundred thirty-two million, three hundred twenty-six thousand, seven hundred twenty".