1316137518 has 96 divisors (see below), whose sum is σ = 3149284320. Its totient is φ = 406010880.

The previous prime is 1316137517. The next prime is 1316137531. The reversal of 1316137518 is 8157316131.

1316137518 is a `hidden beast` number, since 1 + 3 + 1 + 6 + 137 + 518 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316137517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7271388 + ... + 7271568.

It is an arithmetic number, because the mean of its divisors is an integer number (32805045).

Almost surely, 2^1316137518 is an apocalyptic number.

1316137518 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1316137518, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1574642160).

1316137518 is an abundant number, since it is smaller than the sum of its proper divisors (1833146802).

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

1316137518 is a wasteful number, since it uses less digits than its factorization.

1316137518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 292 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 1316137518 is about 36278.6096481108. The cubic root of 1316137518 is about 1095.8903173800.

The spelling of 1316137518 in words is "one billion, three hundred sixteen million, one hundred thirty-seven thousand, five hundred eighteen".