161000002015 has 4 divisors (see below), whose sum is σ = 193200002424. Its totient is φ = 128800001608.

The previous prime is 161000002013. The next prime is 161000002039. The reversal of 161000002015 is 510200000161.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 510200000161 = 374761 ⋅1361401.

It is a cyclic number.

It is not a de Polignac number, because 161000002015 - 2¹ = 161000002013 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161000002015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161000002013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16100000197 + ... + 16100000206.

It is an arithmetic number, because the mean of its divisors is an integer number (48300000606).

Almost surely, 2^161000002015 is an apocalyptic number.

161000002015 is a deficient number, since it is larger than the sum of its proper divisors (32200000409).

161000002015 is an equidigital number, since it uses as much as digits as its factorization.

161000002015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32200000408.

The product of its (nonzero) digits is 60, while the sum is 16.

Adding to 161000002015 its reverse (510200000161), we get a palindrome (671200002176).

The spelling of 161000002015 in words is "one hundred sixty-one billion, two thousand, fifteen".