5156720720 has 20 divisors (see below), whose sum is σ = 11989375860. Its totient is φ = 2062688256.

The previous prime is 5156720713. The next prime is 5156720749. The reversal of 5156720720 is 270276515.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1922296336 + 3234424384 = 43844^2 + 56872^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32229425 + ... + 32229584.

It is an arithmetic number, because the mean of its divisors is an integer number (599468793).

Almost surely, 2^5156720720 is an apocalyptic number.

It is an amenable number.

5156720720 is an abundant number, since it is smaller than the sum of its proper divisors (6832655140).

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

5156720720 is a wasteful number, since it uses less digits than its factorization.

5156720720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64459022 (or 64459016 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 5156720720 is about 71810.3106802916. The cubic root of 5156720720 is about 1727.6583776109.

The spelling of 5156720720 in words is "five billion, one hundred fifty-six million, seven hundred twenty thousand, seven hundred twenty".