161478466679 has 4 divisors (see below), whose sum is σ = 164914178784. Its totient is φ = 158042754576.

The previous prime is 161478466663. The next prime is 161478466691. The reversal of 161478466679 is 976664874161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976664874161 = 29 ⋅33678099109.

It is a cyclic number.

It is not a de Polignac number, because 161478466679 - 2⁴ = 161478466663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161478466379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1717855982 + ... + 1717856075.

It is an arithmetic number, because the mean of its divisors is an integer number (41228544696).

Almost surely, 2^161478466679 is an apocalyptic number.

161478466679 is a deficient number, since it is larger than the sum of its proper divisors (3435712105).

161478466679 is an equidigital number, since it uses as much as digits as its factorization.

161478466679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435712104.

The product of its digits is 73156608, while the sum is 65.

The spelling of 161478466679 in words is "one hundred sixty-one billion, four hundred seventy-eight million, four hundred sixty-six thousand, six hundred seventy-nine".