4921780500 has 864 divisors, whose sum is σ = 20798957088. Its totient is φ = 967680000.

The previous prime is 4921780489. The next prime is 4921780519. The reversal of 4921780500 is 50871294.

It can be written as a sum of positive squares in 16 ways, for example, as 2300545296 + 2621235204 = 47964^2 + 51198^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 48730450 + ... + 48730550.

It is an arithmetic number, because the mean of its divisors is an integer number (24072867).

Almost surely, 2^4921780500 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 4921780500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10399478544).

4921780500 is an abundant number, since it is smaller than the sum of its proper divisors (15877176588).

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

4921780500 is a wasteful number, since it uses less digits than its factorization.

4921780500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 4921780500 is about 70155.4025004490. The cubic root of 4921780500 is about 1701.0121423713.

The spelling of 4921780500 in words is "four billion, nine hundred twenty-one million, seven hundred eighty thousand, five hundred".