65718057280 has 168 divisors, whose sum is σ = 167444955432. Its totient is φ = 24559386624.

The previous prime is 65718057271. The next prime is 65718057283. The reversal of 65718057280 is 8275081756.

65718057280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 25278456064 + 40439601216 = 158992^2 + 201096^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65718057283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8429064 + ... + 8436856.

Almost surely, 2^65718057280 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 65718057280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83722477716).

65718057280 is an abundant number, since it is smaller than the sum of its proper divisors (101726898152).

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

65718057280 is a wasteful number, since it uses less digits than its factorization.

65718057280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7921 (or 7892 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 49.

The spelling of 65718057280 in words is "sixty-five billion, seven hundred eighteen million, fifty-seven thousand, two hundred eighty".