1315161644 has 12 divisors (see below), whose sum is σ = 2301789504. Its totient is φ = 657507504.

The previous prime is 1315161619. The next prime is 1315161719. The reversal of 1315161644 is 4461615131.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1315161644.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52082 + ... + 73094.

It is an arithmetic number, because the mean of its divisors is an integer number (191815792).

Almost surely, 2^1315161644 is an apocalyptic number.

It is an amenable number.

1315161644 is a deficient number, since it is larger than the sum of its proper divisors (986627860).

1315161644 is a wasteful number, since it uses less digits than its factorization.

1315161644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36664 (or 36662 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 1315161644 is about 36265.1574379596. The cubic root of 1315161644 is about 1095.6193945007.

Adding to 1315161644 its reverse (4461615131), we get a palindrome (5776776775).

The spelling of 1315161644 in words is "one billion, three hundred fifteen million, one hundred sixty-one thousand, six hundred forty-four".