1317461251860 has 768 divisors, whose sum is σ = 4760056627200. Its totient is φ = 300029184000.

The previous prime is 1317461251837. The next prime is 1317461251871. The reversal of 1317461251860 is 681521647131.

1317461251860 is a `hidden beast` number, since 1 + 3 + 1 + 7 + 461 + 2 + 5 + 186 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 675273885 + ... + 675275835.

It is an arithmetic number, because the mean of its divisors is an integer number (6197990400).

Almost surely, 2^{1317461251860} is an apocalyptic number.

1317461251860 is a gapful number since it is divisible by the number (10) 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 1317461251860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2380028313600).

1317461251860 is an abundant number, since it is smaller than the sum of its proper divisors (3442595375340).

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

1317461251860 is a wasteful number, since it uses less digits than its factorization.

1317461251860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149 (or 2141 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

Adding to 1317461251860 its reverse (681521647131), we get a palindrome (1998982898991).

The spelling of 1317461251860 in words is "one trillion, three hundred seventeen billion, four hundred sixty-one million, two hundred fifty-one thousand, eight hundred sixty".