6520216956 has 48 divisors (see below), whose sum is σ = 16681230720. Its totient is φ = 1965785920.

The previous prime is 6520216951. The next prime is 6520216981. The reversal of 6520216956 is 6596120256.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520216951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 99366 + ... + 151373.

It is an arithmetic number, because the mean of its divisors is an integer number (347525640).

Almost surely, 2^6520216956 is an apocalyptic number.

6520216956 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6520216956 is an abundant number, since it is smaller than the sum of its proper divisors (10161013764).

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

6520216956 is a wasteful number, since it uses less digits than its factorization.

6520216956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250954 (or 250952 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 6520216956 is about 80747.8603803222. The cubic root of 6520216956 is about 1868.1884480056.

The spelling of 6520216956 in words is "six billion, five hundred twenty million, two hundred sixteen thousand, nine hundred fifty-six".