78441611 has 2 divisors, whose sum is σ = 78441612. Its totient is φ = 78441610.

The previous prime is 78441551. The next prime is 78441613. The reversal of 78441611 is 11614487.

It is a strong prime.

It is an emirp because it is prime and its reverse (11614487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78441611 - 2¹⁴ = 78425227 is a prime.

Together with 78441613, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78441613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39220805 + 39220806.

It is an arithmetic number, because the mean of its divisors is an integer number (39220806).

Almost surely, 2^78441611 is an apocalyptic number.

78441611 is a deficient number, since it is larger than the sum of its proper divisors (1).

78441611 is an equidigital number, since it uses as much as digits as its factorization.

78441611 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 78441611 is about 8856.7268784806. The cubic root of 78441611 is about 428.0706986451.

The spelling of 78441611 in words is "seventy-eight million, four hundred forty-one thousand, six hundred eleven".