6451645835166 has 192 divisors, whose sum is σ = 16365417707520. Its totient is φ = 1684196478720.

The previous prime is 6451645835143. The next prime is 6451645835171. The reversal of 6451645835166 is 6615385461546.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 50674060 + ... + 50801216.

It is an arithmetic number, because the mean of its divisors is an integer number (85236550560).

Almost surely, 2^{6451645835166} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6451645835166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8182708853760).

6451645835166 is an abundant number, since it is smaller than the sum of its proper divisors (9913771872354).

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

6451645835166 is a wasteful number, since it uses less digits than its factorization.

6451645835166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127519 (or 127512 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 60.

The spelling of 6451645835166 in words is "six trillion, four hundred fifty-one billion, six hundred forty-five million, eight hundred thirty-five thousand, one hundred sixty-six".