1316991560 has 32 divisors (see below), whose sum is σ = 2964938040. Its totient is φ = 526493184.

The previous prime is 1316991553. The next prime is 1316991607. The reversal of 1316991560 is 651996131.

It can be written as a sum of positive squares in 4 ways, for example, as 994645444 + 322346116 = 31538^2 + 17954^2 .

It is a super-2 number, since 2×1316991560² = 3468933538222467200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68804 + ... + 85836.

Almost surely, 2^1316991560 is an apocalyptic number.

1316991560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1316991560 is an abundant number, since it is smaller than the sum of its proper divisors (1647946480).

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

1316991560 is a wasteful number, since it uses less digits than its factorization.

1316991560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18977 (or 18973 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 1316991560 is about 36290.3783391686. The cubic root of 1316991560 is about 1096.1273073033.

The spelling of 1316991560 in words is "one billion, three hundred sixteen million, nine hundred ninety-one thousand, five hundred sixty".