4021171355880 has 512 divisors, whose sum is σ = 15637697740800. Its totient is φ = 900160128000.

The previous prime is 4021171355879. The next prime is 4021171355909. The reversal of 4021171355880 is 885531711204.

4021171355880 is a `hidden beast` number, since 4 + 0 + 2 + 1 + 1 + 7 + 13 + 558 + 80 = 666.

It is a super-2 number, since 2×4021171355880² (a number of 26 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 81025954 + ... + 81075566.

It is an arithmetic number, because the mean of its divisors is an integer number (30542378400).

Almost surely, 2^{4021171355880} is an apocalyptic number.

4021171355880 is a gapful number since it is divisible by the number (40) 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 4021171355880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7818848870400).

4021171355880 is an abundant number, since it is smaller than the sum of its proper divisors (11616526384920).

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

4021171355880 is a wasteful number, since it uses less digits than its factorization.

4021171355880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49862 (or 49852 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 45.

The spelling of 4021171355880 in words is "four trillion, twenty-one billion, one hundred seventy-one million, three hundred fifty-five thousand, eight hundred eighty".