6537705280 has 56 divisors (see below), whose sum is σ = 15609932712. Its totient is φ = 2608023552.

The previous prime is 6537705241. The next prime is 6537705319. The reversal of 6537705280 is 825077356.

It is an interprime number because it is at equal distance from previous prime (6537705241) and next prime (6537705319).

It can be written as a sum of positive squares in 4 ways, for example, as 2344883776 + 4192821504 = 48424^2 + 64752^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91974 + ... + 146746.

Almost surely, 2^6537705280 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 6537705280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7804966356).

6537705280 is an abundant number, since it is smaller than the sum of its proper divisors (9072227432).

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

6537705280 is a wasteful number, since it uses less digits than its factorization.

6537705280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55163 (or 55153 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 6537705280 is about 80856.0775699638. The cubic root of 6537705280 is about 1869.8572226487.

The spelling of 6537705280 in words is "six billion, five hundred thirty-seven million, seven hundred five thousand, two hundred eighty".