1317015660 has 24 divisors (see below), whose sum is σ = 3687644016. Its totient is φ = 351204160.

The previous prime is 1317015617. The next prime is 1317015677. The reversal of 1317015660 is 665107131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10975071 + ... + 10975190.

It is an arithmetic number, because the mean of its divisors is an integer number (153651834).

Almost surely, 2^1317015660 is an apocalyptic number.

1317015660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1317015660 is an abundant number, since it is smaller than the sum of its proper divisors (2370628356).

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

1317015660 is a wasteful number, since it uses less digits than its factorization.

1317015660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21950273 (or 21950271 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 1317015660 is about 36290.7103815839. The cubic root of 1317015660 is about 1096.1339933767.

The spelling of 1317015660 in words is "one billion, three hundred seventeen million, fifteen thousand, six hundred sixty".