161596013 has 8 divisors (see below), whose sum is σ = 163647000. Its totient is φ = 159558208.

The previous prime is 161596003. The next prime is 161596037. The reversal of 161596013 is 310695161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16104169 + 145491844 = 4013^2 + 12062^2 .

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 161596013 - 2¹² = 161591917 is a prime.

It is a super-2 number, since 2×161596013² = 52226542834992338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161596003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22643 + ... + 28911.

It is an arithmetic number, because the mean of its divisors is an integer number (20455875).

Almost surely, 2^161596013 is an apocalyptic number.

It is an amenable number.

161596013 is a deficient number, since it is larger than the sum of its proper divisors (2050987).

161596013 is a wasteful number, since it uses less digits than its factorization.

161596013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6591.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 161596013 is about 12712.0420468153. The cubic root of 161596013 is about 544.6826567645.

The spelling of 161596013 in words is "one hundred sixty-one million, five hundred ninety-six thousand, thirteen".