161113255478 has 32 divisors (see below), whose sum is σ = 282149568000. Its totient is φ = 68970432552.

The previous prime is 161113255469. The next prime is 161113255517. The reversal of 161113255478 is 874552311161.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 476093 + ... + 740871.

It is an arithmetic number, because the mean of its divisors is an integer number (8817174000).

Almost surely, 2^161113255478 is an apocalyptic number.

161113255478 is a deficient number, since it is larger than the sum of its proper divisors (121036312522).

161113255478 is an equidigital number, since it uses as much as digits as its factorization.

161113255478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265689 (or 265675 counting only the distinct ones).

The product of its digits is 201600, while the sum is 44.

The spelling of 161113255478 in words is "one hundred sixty-one billion, one hundred thirteen million, two hundred fifty-five thousand, four hundred seventy-eight".