1642921250880 has 2016 divisors, whose sum is σ = 7058198736000. Its totient is φ = 321721860096.

The previous prime is 1642921250849. The next prime is 1642921250881. The reversal of 1642921250880 is 880521292461.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1642921250881) by changing a digit.

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 287 ways as a sum of consecutive naturals, for example, 11026317046 + ... + 11026317194.

Almost surely, 2^{1642921250880} is an apocalyptic number.

1642921250880 is a gapful number since it is divisible by the number (10) 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 1642921250880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3529099368000).

1642921250880 is an abundant number, since it is smaller than the sum of its proper divisors (5415277485120).

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

1642921250880 is a wasteful number, since it uses less digits than its factorization.

1642921250880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The spelling of 1642921250880 in words is "one trillion, six hundred forty-two billion, nine hundred twenty-one million, two hundred fifty thousand, eight hundred eighty".