6537609216 has 228 divisors, whose sum is σ = 20120037912. Its totient is φ = 2038431744.

The previous prime is 6537609193. The next prime is 6537609259. The reversal of 6537609216 is 6129067356.

6537609216 is a `hidden beast` number, since 6 + 5 + 37 + 609 + 2 + 1 + 6 = 666.

It is a super-2 number, since 2×6537609216² = 85480668522256269312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40107951 + ... + 40108113.

Almost surely, 2^6537609216 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 6537609216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10060018956).

6537609216 is an abundant number, since it is smaller than the sum of its proper divisors (13582428696).

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

6537609216 is an equidigital number, since it uses as much as digits as its factorization.

6537609216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 6537609216 is about 80855.4835246194. The cubic root of 6537609216 is about 1869.8480641425.

It can be divided in two parts, 653760 and 9216, that added together give a triangular number (662976 = T₁₁₅₁).

The spelling of 6537609216 in words is "six billion, five hundred thirty-seven million, six hundred nine thousand, two hundred sixteen".