161315282815 has 16 divisors (see below), whose sum is σ = 198151718688. Its totient is φ = 126005475456.

The previous prime is 161315282801. The next prime is 161315282839. The reversal of 161315282815 is 518282513161.

It is a cyclic number.

It is not a de Polignac number, because 161315282815 - 2²⁵ = 161281728383 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 467229 + ... + 735481.

It is an arithmetic number, because the mean of its divisors is an integer number (12384482418).

Almost surely, 2^161315282815 is an apocalyptic number.

161315282815 is a deficient number, since it is larger than the sum of its proper divisors (36836435873).

161315282815 is a wasteful number, since it uses less digits than its factorization.

161315282815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271098.

The product of its digits is 115200, while the sum is 43.

Adding to 161315282815 its reverse (518282513161), we get a palindrome (679597795976).

The spelling of 161315282815 in words is "one hundred sixty-one billion, three hundred fifteen million, two hundred eighty-two thousand, eight hundred fifteen".