161315282879 has 4 divisors (see below), whose sum is σ = 170804417184. Its totient is φ = 151826148576.

The previous prime is 161315282839. The next prime is 161315282923. The reversal of 161315282879 is 978282513161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161315282879 - 2¹² = 161315278783 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 161315282879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161315282839) 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, 4744567127 + ... + 4744567160.

It is an arithmetic number, because the mean of its divisors is an integer number (42701104296).

Almost surely, 2^161315282879 is an apocalyptic number.

161315282879 is a deficient number, since it is larger than the sum of its proper divisors (9489134305).

161315282879 is an equidigital number, since it uses as much as digits as its factorization.

161315282879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9489134304.

The product of its digits is 1451520, while the sum is 53.

The spelling of 161315282879 in words is "one hundred sixty-one billion, three hundred fifteen million, two hundred eighty-two thousand, eight hundred seventy-nine".