4975721520 has 640 divisors, whose sum is σ = 20844380160. Its totient is φ = 950538240.

The previous prime is 4975721519. The next prime is 4975721521. The reversal of 4975721520 is 251275794.

It is an interprime number because it is at equal distance from previous prime (4975721519) and next prime (4975721521).

It is a super-2 number, since 2×4975721520² = 49515609289182220800, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (4975721521) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 12991249 + ... + 12991631.

It is an arithmetic number, because the mean of its divisors is an integer number (32569344).

Almost surely, 2^4975721520 is an apocalyptic number.

4975721520 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 4975721520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10422190080).

4975721520 is an abundant number, since it is smaller than the sum of its proper divisors (15868658640).

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

4975721520 is a wasteful number, since it uses less digits than its factorization.

4975721520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 42.

The square root of 4975721520 is about 70538.7944325674. The cubic root of 4975721520 is about 1707.2037470489.

The spelling of 4975721520 in words is "four billion, nine hundred seventy-five million, seven hundred twenty-one thousand, five hundred twenty".