161078643 has 12 divisors (see below), whose sum is σ = 253821048. Its totient is φ = 97623360.

The previous prime is 161078639. The next prime is 161078651. The reversal of 161078643 is 346870161.

161078643 is a `hidden beast` number, since 1 + 6 + 1 + 0 + 7 + 8 + 643 = 666.

It is not a de Polignac number, because 161078643 - 2² = 161078639 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 161078598 and 161078607.

It is not an unprimeable number, because it can be changed into a prime (161078663) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 813430 + ... + 813627.

It is an arithmetic number, because the mean of its divisors is an integer number (21151754).

Almost surely, 2^161078643 is an apocalyptic number.

161078643 is a deficient number, since it is larger than the sum of its proper divisors (92742405).

161078643 is a wasteful number, since it uses less digits than its factorization.

161078643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1627074 (or 1627071 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 161078643 is about 12691.6761304408. The cubic root of 161078643 is about 544.1007452454.

The spelling of 161078643 in words is "one hundred sixty-one million, seventy-eight thousand, six hundred forty-three".