4991723520 has 384 divisors, whose sum is σ = 18492364800. Its totient is φ = 1125974016.

The previous prime is 4991723479. The next prime is 4991723531. The reversal of 4991723520 is 253271994.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29890477 + ... + 29890643.

It is an arithmetic number, because the mean of its divisors is an integer number (48157200).

Almost surely, 2^4991723520 is an apocalyptic number.

4991723520 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 4991723520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9246182400).

4991723520 is an abundant number, since it is smaller than the sum of its proper divisors (13500641280).

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

4991723520 is a wasteful number, since it uses less digits than its factorization.

4991723520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 42.

The square root of 4991723520 is about 70652.1303288160. The cubic root of 4991723520 is about 1709.0319201556.

It can be divided in two parts, 49917 and 23520, that added together give a palindrome (73437).

The spelling of 4991723520 in words is "four billion, nine hundred ninety-one million, seven hundred twenty-three thousand, five hundred twenty".