78508245833 has 2 divisors, whose sum is σ = 78508245834. Its totient is φ = 78508245832.

The previous prime is 78508245799. The next prime is 78508245859. The reversal of 78508245833 is 33854280587.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68831195449 + 9677050384 = 262357^2 + 98372^2 .

It is a cyclic number.

It is not a de Polignac number, because 78508245833 - 2¹⁰ = 78508244809 is a prime.

It is not a weakly prime, because it can be changed into another prime (78508245863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39254122916 + 39254122917.

It is an arithmetic number, because the mean of its divisors is an integer number (39254122917).

Almost surely, 2^78508245833 is an apocalyptic number.

It is an amenable number.

78508245833 is a deficient number, since it is larger than the sum of its proper divisors (1).

78508245833 is an equidigital number, since it uses as much as digits as its factorization.

78508245833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6451200, while the sum is 53.

The spelling of 78508245833 in words is "seventy-eight billion, five hundred eight million, two hundred forty-five thousand, eight hundred thirty-three".