1326580554488 has 64 divisors (see below), whose sum is σ = 3012212111040. Its totient is φ = 534678257664.

The previous prime is 1326580554487. The next prime is 1326580554491. The reversal of 1326580554488 is 8844550856231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326580554487) 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, 697556 + ... + 1771932.

It is an arithmetic number, because the mean of its divisors is an integer number (47065814235).

Almost surely, 2^{1326580554488} 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 1326580554488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506106055520).

1326580554488 is an abundant number, since it is smaller than the sum of its proper divisors (1685631556552).

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

1326580554488 is a wasteful number, since it uses less digits than its factorization.

1326580554488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075704 (or 1075700 counting only the distinct ones).

The product of its (nonzero) digits is 36864000, while the sum is 59.

The spelling of 1326580554488 in words is "one trillion, three hundred twenty-six billion, five hundred eighty million, five hundred fifty-four thousand, four hundred eighty-eight".