1315161612 has 36 divisors (see below), whose sum is σ = 3346761600. Its totient is φ = 435443232.

The previous prime is 1315161593. The next prime is 1315161619. The reversal of 1315161612 is 2161615131.

1315161612 is a `hidden beast` number, since 1 + 31 + 5 + 1 + 616 + 12 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1315161619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117228 + ... + 127955.

It is an arithmetic number, because the mean of its divisors is an integer number (92965600).

Almost surely, 2^1315161612 is an apocalyptic number.

1315161612 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1315161612 is an abundant number, since it is smaller than the sum of its proper divisors (2031599988).

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

1315161612 is a wasteful number, since it uses less digits than its factorization.

1315161612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245342 (or 245337 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 1315161612 is about 36265.1569967648. The cubic root of 1315161612 is about 1095.6193856146.

Adding to 1315161612 its reverse (2161615131), we get a palindrome (3476776743).

The spelling of 1315161612 in words is "one billion, three hundred fifteen million, one hundred sixty-one thousand, six hundred twelve".