6520957000 has 32 divisors (see below), whose sum is σ = 15259041720. Its totient is φ = 2608382400.

The previous prime is 6520956991. The next prime is 6520957007. The reversal of 6520957000 is 7590256.

It can be written as a sum of positive squares in 4 ways, for example, as 1262096676 + 5258860324 = 35526^2 + 72518^2 .

It is not an unprimeable number, because it can be changed into a prime (6520957007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3259479 + ... + 3261478.

Almost surely, 2^6520957000 is an apocalyptic number.

It is an amenable number.

6520957000 is an abundant number, since it is smaller than the sum of its proper divisors (8738084720).

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

6520957000 is a wasteful number, since it uses less digits than its factorization.

6520957000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6520978 (or 6520964 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 6520957000 is about 80752.4426875126. The cubic root of 6520957000 is about 1868.2591250684.

The spelling of 6520957000 in words is "six billion, five hundred twenty million, nine hundred fifty-seven thousand".