6521271012 has 48 divisors (see below), whose sum is σ = 17096990400. Its totient is φ = 2149329600.

The previous prime is 6521271007. The next prime is 6521271037. The reversal of 6521271012 is 2101721256.

6521271012 is a `hidden beast` number, since 652 + 1 + 2 + 7 + 1 + 0 + 1 + 2 = 666.

It is a super-2 number, since 2×6521271012² = 85053951223903008288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 329614 + ... + 348837.

It is an arithmetic number, because the mean of its divisors is an integer number (356187300).

Almost surely, 2^6521271012 is an apocalyptic number.

It is an amenable number.

6521271012 is an abundant number, since it is smaller than the sum of its proper divisors (10575719388).

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

6521271012 is a wasteful number, since it uses less digits than its factorization.

6521271012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 678553 (or 678545 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 6521271012 is about 80754.3869520412. The cubic root of 6521271012 is about 1868.2891128124.

Adding to 6521271012 its reverse (2101721256), we get a palindrome (8622992268).

The spelling of 6521271012 in words is "six billion, five hundred twenty-one million, two hundred seventy-one thousand, twelve".