1317095640 has 160 divisors (see below), whose sum is σ = 5059406880. Its totient is φ = 301045248.

The previous prime is 1317095579. The next prime is 1317095641. The reversal of 1317095640 is 465907131.

1317095640 is a `hidden beast` number, since 1 + 3 + 1 + 7 + 0 + 9 + 5 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1317095595 and 1317095604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317095641) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6357 + ... + 51716.

It is an arithmetic number, because the mean of its divisors is an integer number (31621293).

Almost surely, 2^1317095640 is an apocalyptic number.

1317095640 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 1317095640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2529703440).

1317095640 is an abundant number, since it is smaller than the sum of its proper divisors (3742311240).

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

1317095640 is a wasteful number, since it uses less digits than its factorization.

1317095640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58103 (or 58090 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 1317095640 is about 36291.8122997461. The cubic root of 1317095640 is about 1096.1561816784.

The spelling of 1317095640 in words is "one billion, three hundred seventeen million, ninety-five thousand, six hundred forty".