161505115106579 has 4 divisors (see below), whose sum is σ = 168527076632976. Its totient is φ = 154483153580184.

The previous prime is 161505115106497. The next prime is 161505115106639. The reversal of 161505115106579 is 975601511505161.

161505115106579 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 161505115106579 - 2¹² = 161505115102483 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 161505115106579.

It is not an unprimeable number, because it can be changed into a prime (161505115106879) 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, 3510980763164 + ... + 3510980763209.

It is an arithmetic number, because the mean of its divisors is an integer number (42131769158244).

Almost surely, 2^{161505115106579} is an apocalyptic number.

161505115106579 is a deficient number, since it is larger than the sum of its proper divisors (7021961526397).

161505115106579 is an equidigital number, since it uses as much as digits as its factorization.

161505115106579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7021961526396.

The product of its (nonzero) digits is 1417500, while the sum is 53.

The spelling of 161505115106579 in words is "one hundred sixty-one trillion, five hundred five billion, one hundred fifteen million, one hundred six thousand, five hundred seventy-nine".