161481575767678 has 12 divisors (see below), whose sum is σ = 255641885184600. Its totient is φ = 76491272731716.

The previous prime is 161481575767627. The next prime is 161481575767679. The reversal of 161481575767678 is 876767575184161.

It is a junction number, because it is equal to n+sod(n) for n = 161481575767598 and 161481575767607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161481575767679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111829345378 + ... + 111829346821.

It is an arithmetic number, because the mean of its divisors is an integer number (21303490432050).

Almost surely, 2^{161481575767678} is an apocalyptic number.

161481575767678 is a deficient number, since it is larger than the sum of its proper divisors (94160309416922).

161481575767678 is a wasteful number, since it uses less digits than its factorization.

161481575767678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223658692239 (or 223658692220 counting only the distinct ones).

The product of its digits is 3319142400, while the sum is 79.

The spelling of 161481575767678 in words is "one hundred sixty-one trillion, four hundred eighty-one billion, five hundred seventy-five million, seven hundred sixty-seven thousand, six hundred seventy-eight".