1326918504816 has 400 divisors, whose sum is σ = 4004152289280. Its totient is φ = 423769812480.

The previous prime is 1326918504731. The next prime is 1326918504827. The reversal of 1326918504816 is 6184058196231.

It is a happy number.

1326918504816 is a `hidden beast` number, since 1 + 3 + 26 + 91 + 8 + 50 + 481 + 6 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2841367015 + ... + 2841367481.

Almost surely, 2^{1326918504816} is an apocalyptic number.

1326918504816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1326918504816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2002076144640).

1326918504816 is an abundant number, since it is smaller than the sum of its proper divisors (2677233784464).

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

1326918504816 is a wasteful number, since it uses less digits than its factorization.

1326918504816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074 (or 1059 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The spelling of 1326918504816 in words is "one trillion, three hundred twenty-six billion, nine hundred eighteen million, five hundred four thousand, eight hundred sixteen".