1318491841536 has 297 divisors, whose sum is σ = 3962287449211. Its totient is φ = 438505187328.

The previous prime is 1318491841519. The next prime is 1318491841549. The reversal of 1318491841536 is 6351481948131.

The square root of 1318491841536 is 1148256.

It is a perfect power (a square), and thus also a powerful number.

1318491841536 is a `hidden beast` number, since 1 + 3 + 18 + 4 + 91 + 8 + 4 + 1 + 536 = 666.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2976279331 + ... + 2976279773.

Almost surely, 2^{1318491841536} is an apocalyptic number.

1318491841536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1318491841536 is the 1148256-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1318491841536

1318491841536 is an abundant number, since it is smaller than the sum of its proper divisors (2643795607675).

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

1318491841536 is an frugal number, since it uses more digits than its factorization.

1318491841536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 930 (or 448 counting only the distinct ones).

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

The spelling of 1318491841536 in words is "one trillion, three hundred eighteen billion, four hundred ninety-one million, eight hundred forty-one thousand, five hundred thirty-six".