78798161 has 16 divisors (see below), whose sum is σ = 89040000. Its totient is φ = 69189120.

The previous prime is 78798151. The next prime is 78798173. The reversal of 78798161 is 16189787.

It is not a de Polignac number, because 78798161 - 2²² = 74603857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78798131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62465 + ... + 63713.

It is an arithmetic number, because the mean of its divisors is an integer number (5565000).

Almost surely, 2^78798161 is an apocalyptic number.

It is an amenable number.

78798161 is a deficient number, since it is larger than the sum of its proper divisors (10241839).

78798161 is a wasteful number, since it uses less digits than its factorization.

78798161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496.

The product of its digits is 169344, while the sum is 47.

The square root of 78798161 is about 8876.8328248312. The cubic root of 78798161 is about 428.7183053350.

The spelling of 78798161 in words is "seventy-eight million, seven hundred ninety-eight thousand, one hundred sixty-one".