6537320755056 has 640 divisors, whose sum is σ = 24673354137600. Its totient is φ = 1608993745920.

The previous prime is 6537320754959. The next prime is 6537320755079. The reversal of 6537320755056 is 6505570237356.

6537320755056 is a `hidden beast` number, since 6 + 5 + 3 + 7 + 32 + 0 + 7 + 550 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 6537320754993 and 6537320755011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 49978861 + ... + 50109491.

It is an arithmetic number, because the mean of its divisors is an integer number (38552115840).

Almost surely, 2^{6537320755056} 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 6537320755056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12336677068800).

6537320755056 is an abundant number, since it is smaller than the sum of its proper divisors (18136033382544).

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

6537320755056 is a wasteful number, since it uses less digits than its factorization.

6537320755056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130754 (or 130742 counting only the distinct ones).

The product of its (nonzero) digits is 19845000, while the sum is 54.

The spelling of 6537320755056 in words is "six trillion, five hundred thirty-seven billion, three hundred twenty million, seven hundred fifty-five thousand, fifty-six".