6421942177280 has 160 divisors (see below), whose sum is σ = 17606195792064. Its totient is φ = 2200691736576.

The previous prime is 6421942177237. The next prime is 6421942177303. The reversal of 6421942177280 is 827712491246.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35624654 + ... + 35804466.

Almost surely, 2^{6421942177280} 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 6421942177280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8803097896032).

6421942177280 is an abundant number, since it is smaller than the sum of its proper divisors (11184253614784).

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

6421942177280 is a wasteful number, since it uses less digits than its factorization.

6421942177280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181836 (or 181820 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 53.

The spelling of 6421942177280 in words is "six trillion, four hundred twenty-one billion, nine hundred forty-two million, one hundred seventy-seven thousand, two hundred eighty".