6521651002048 has 168 divisors, whose sum is σ = 16496067197792. Its totient is φ = 2491026628608.

The previous prime is 6521651001989. The next prime is 6521651002081. The reversal of 6521651002048 is 8402001561256.

It is a self number, because there is not a number n which added to its sum of digits gives 6521651002048.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4232236 + ... + 5563732.

Almost surely, 2^{6521651002048} 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 6521651002048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8248033598896).

6521651002048 is an abundant number, since it is smaller than the sum of its proper divisors (9974416195744).

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

6521651002048 is a wasteful number, since it uses less digits than its factorization.

6521651002048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331587 (or 1331548 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The spelling of 6521651002048 in words is "six trillion, five hundred twenty-one billion, six hundred fifty-one million, two thousand, forty-eight".