78988161 has 32 divisors (see below), whose sum is σ = 122830848. Its totient is φ = 44222400.

The previous prime is 78988127. The next prime is 78988177. The reversal of 78988161 is 16188987.

It is not a de Polignac number, because 78988161 - 2⁶ = 78988097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78988161.

It is not an unprimeable number, because it can be changed into a prime (78988121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354096 + ... + 354318.

It is an arithmetic number, because the mean of its divisors is an integer number (3838464).

Almost surely, 2^78988161 is an apocalyptic number.

It is an amenable number.

78988161 is a deficient number, since it is larger than the sum of its proper divisors (43842687).

78988161 is a wasteful number, since it uses less digits than its factorization.

78988161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501.

The product of its digits is 193536, while the sum is 48.

The square root of 78988161 is about 8887.5283965791. The cubic root of 78988161 is about 429.0626073450.

The spelling of 78988161 in words is "seventy-eight million, nine hundred eighty-eight thousand, one hundred sixty-one".