4891621280 has 192 divisors, whose sum is σ = 14331582720. Its totient is φ = 1536344064.

The previous prime is 4891621261. The next prime is 4891621333. The reversal of 4891621280 is 821261984.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2022632 + ... + 2025048.

It is an arithmetic number, because the mean of its divisors is an integer number (74643660).

Almost surely, 2^4891621280 is an apocalyptic number.

4891621280 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 4891621280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7165791360).

4891621280 is an abundant number, since it is smaller than the sum of its proper divisors (9439961440).

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

4891621280 is a wasteful number, since it uses less digits than its factorization.

4891621280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591 (or 2583 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 4891621280 is about 69940.1263939378. The cubic root of 4891621280 is about 1697.5305876901.

The spelling of 4891621280 in words is "four billion, eight hundred ninety-one million, six hundred twenty-one thousand, two hundred eighty".