4991422500 has 225 divisors, whose sum is σ = 16410004149. Its totient is φ = 1322568000.

The previous prime is 4991422459. The next prime is 4991422613. The reversal of 4991422500 is 52241994.

The square root of 4991422500 is 70650.

It is a perfect power (a square), and thus also a powerful number.

4991422500 is a `hidden beast` number, since 4 + 9 + 9 + 142 + 2 + 500 = 666.

It can be written as a sum of positive squares in 7 ways, for example, as 4587894756 + 403527744 = 67734^2 + 20088^2 .

It is a tau number, because it is divible by the number of its divisors (225).

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

It is an unprimeable number.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 31792422 + ... + 31792578.

Almost surely, 2^4991422500 is an apocalyptic number.

4991422500 is the 70650-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4991422500

4991422500 is an abundant number, since it is smaller than the sum of its proper divisors (11418581649).

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

4991422500 is an equidigital number, since it uses as much as digits as its factorization.

4991422500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The cubic root of 4991422500 is about 1708.9975657469.

Multiplying 4991422500 by its sum of digits (36), we get a square (179691210000 = 423900²).

4991422500 divided by its sum of digits (36) gives a square (138650625 = 11775²).

The spelling of 4991422500 in words is "four billion, nine hundred ninety-one million, four hundred twenty-two thousand, five hundred".