161063578318613 has 8 divisors (see below), whose sum is σ = 170547664617432. Its totient is φ = 151580576260096.

The previous prime is 161063578318607. The next prime is 161063578318651. The reversal of 161063578318613 is 316813875360161.

It can be written as a sum of positive squares in 4 ways, for example, as 6183985244644 + 154879593073969 = 2486762^2 + 12445063^2 .

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

It is not a de Polignac number, because 161063578318613 - 2⁴⁰ = 159964066690837 is a prime.

It is a super-2 number, since 2×161063578318613² (a number of 29 digits) 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 (161063578318213) 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, 270754220 + ... + 271348437.

It is an arithmetic number, because the mean of its divisors is an integer number (21318458077179).

Almost surely, 2^{161063578318613} is an apocalyptic number.

It is an amenable number.

161063578318613 is a deficient number, since it is larger than the sum of its proper divisors (9484086298819).

161063578318613 is a wasteful number, since it uses less digits than its factorization.

161063578318613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542120151.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 161063578318613 in words is "one hundred sixty-one trillion, sixty-three billion, five hundred seventy-eight million, three hundred eighteen thousand, six hundred thirteen".