6525170820 has 144 divisors (see below), whose sum is σ = 22640567040. Its totient is φ = 1490151168.

The previous prime is 6525170777. The next prime is 6525170851. The reversal of 6525170820 is 280715256.

It is a happy number.

6525170820 is a `hidden beast` number, since 65 + 2 + 517 + 0 + 82 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2605689 + ... + 2608191.

It is an arithmetic number, because the mean of its divisors is an integer number (157226160).

Almost surely, 2^6525170820 is an apocalyptic number.

6525170820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6525170820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11320283520).

6525170820 is an abundant number, since it is smaller than the sum of its proper divisors (16115396220).

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

6525170820 is a wasteful number, since it uses less digits than its factorization.

6525170820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4594 (or 4589 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 6525170820 is about 80778.5294493531. The cubic root of 6525170820 is about 1868.6614592935.

The spelling of 6525170820 in words is "six billion, five hundred twenty-five million, one hundred seventy thousand, eight hundred twenty".