5161721152 has 84 divisors (see below), whose sum is σ = 12616100244. Its totient is φ = 2082017280.

The previous prime is 5161721137. The next prime is 5161721153. The reversal of 5161721152 is 2511271615.

It can be written as a sum of positive squares in 2 ways, for example, as 4775362816 + 386358336 = 69104^2 + 19656^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5161721153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4902 + ... + 101722.

Almost surely, 2^5161721152 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 5161721152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6308050122).

5161721152 is an abundant number, since it is smaller than the sum of its proper divisors (7454379092).

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

5161721152 is a wasteful number, since it uses less digits than its factorization.

5161721152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96864 (or 96847 counting only the distinct ones).

The product of its digits is 4200, while the sum is 31.

The square root of 5161721152 is about 71845.1191939995. The cubic root of 5161721152 is about 1728.2166295056.

Adding to 5161721152 its reverse (2511271615), we get a palindrome (7672992767).

The spelling of 5161721152 in words is "five billion, one hundred sixty-one million, seven hundred twenty-one thousand, one hundred fifty-two".