161520043013 has 8 divisors (see below), whose sum is σ = 186287861760. Its totient is φ = 137175606000.

The previous prime is 161520043007. The next prime is 161520043019. The reversal of 161520043013 is 310340025161.

It is an interprime number because it is at equal distance from previous prime (161520043007) and next prime (161520043019).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161520043013 - 2¹⁸ = 161519780869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161520043019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105844613 + ... + 105846138.

It is an arithmetic number, because the mean of its divisors is an integer number (23285982720).

Almost surely, 2^161520043013 is an apocalyptic number.

It is an amenable number.

161520043013 is a deficient number, since it is larger than the sum of its proper divisors (24767818747).

161520043013 is a wasteful number, since it uses less digits than its factorization.

161520043013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211690867.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 161520043013 its reverse (310340025161), we get a palindrome (471860068174).

The spelling of 161520043013 in words is "one hundred sixty-one billion, five hundred twenty million, forty-three thousand, thirteen".