78516411 has 8 divisors (see below), whose sum is σ = 109240320. Its totient is φ = 50068392.

The previous prime is 78516407. The next prime is 78516419. The reversal of 78516411 is 11461587.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78516411 - 2² = 78516407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (78516419) 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 7 ways as a sum of consecutive naturals, for example, 568891 + ... + 569028.

It is an arithmetic number, because the mean of its divisors is an integer number (13655040).

Almost surely, 2^78516411 is an apocalyptic number.

78516411 is a deficient number, since it is larger than the sum of its proper divisors (30723909).

78516411 is a wasteful number, since it uses less digits than its factorization.

78516411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137945.

The product of its digits is 6720, while the sum is 33.

The square root of 78516411 is about 8860.9486512450. The cubic root of 78516411 is about 428.2067213313.

Adding to 78516411 its reverse (11461587), we get a palindrome (89977998).

The spelling of 78516411 in words is "seventy-eight million, five hundred sixteen thousand, four hundred eleven".