161145615 has 16 divisors (see below), whose sum is σ = 260493408. Its totient is φ = 85057536.

The previous prime is 161145497. The next prime is 161145617. The reversal of 161145615 is 516541161.

It is not a de Polignac number, because 161145615 - 2⁷ = 161145487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161145617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53922 + ... + 56831.

It is an arithmetic number, because the mean of its divisors is an integer number (16280838).

Almost surely, 2^161145615 is an apocalyptic number.

161145615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

161145615 is a deficient number, since it is larger than the sum of its proper divisors (99347793).

161145615 is a wasteful number, since it uses less digits than its factorization.

161145615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110858.

The product of its digits is 3600, while the sum is 30.

The square root of 161145615 is about 12694.3142784477. The cubic root of 161145615 is about 544.1761420938.

Adding to 161145615 its reverse (516541161), we get a palindrome (677686776).

The spelling of 161145615 in words is "one hundred sixty-one million, one hundred forty-five thousand, six hundred fifteen".