78352776443 has 2 divisors, whose sum is σ = 78352776444. Its totient is φ = 78352776442.

The previous prime is 78352776389. The next prime is 78352776461. The reversal of 78352776443 is 34467725387.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78352776443 - 2¹⁰ = 78352775419 is a prime.

It is a super-2 number, since 2×78352776443² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78352776643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39176388221 + 39176388222.

It is an arithmetic number, because the mean of its divisors is an integer number (39176388222).

Almost surely, 2^78352776443 is an apocalyptic number.

78352776443 is a deficient number, since it is larger than the sum of its proper divisors (1).

78352776443 is an equidigital number, since it uses as much as digits as its factorization.

78352776443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23708160, while the sum is 56.

The spelling of 78352776443 in words is "seventy-eight billion, three hundred fifty-two million, seven hundred seventy-six thousand, four hundred forty-three".