5011721520 has 80 divisors (see below), whose sum is σ = 16731449952. Its totient is φ = 1233653760.

The previous prime is 5011721443. The next prime is 5011721543. The reversal of 5011721520 is 251271105.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×5011721520² = 50234705188062220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 800041 + ... + 806280.

Almost surely, 2^5011721520 is an apocalyptic number.

It is an amenable number.

5011721520 is an abundant number, since it is smaller than the sum of its proper divisors (11719728432).

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

5011721520 is a wasteful number, since it uses less digits than its factorization.

5011721520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606350 (or 1606344 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 24.

The square root of 5011721520 is about 70793.5132621627. The cubic root of 5011721520 is about 1711.3111383385.

Adding to 5011721520 its reverse (251271105), we get a palindrome (5262992625).

The spelling of 5011721520 in words is "five billion, eleven million, seven hundred twenty-one thousand, five hundred twenty".