78772743233 has 2 divisors, whose sum is σ = 78772743234. Its totient is φ = 78772743232.

The previous prime is 78772743173. The next prime is 78772743241. The reversal of 78772743233 is 33234727787.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78763299904 + 9443329 = 280648^2 + 3073^2 .

It is a cyclic number.

It is not a de Polignac number, because 78772743233 - 2¹² = 78772739137 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78772743253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39386371616 + 39386371617.

It is an arithmetic number, because the mean of its divisors is an integer number (39386371617).

Almost surely, 2^78772743233 is an apocalyptic number.

It is an amenable number.

78772743233 is a deficient number, since it is larger than the sum of its proper divisors (1).

78772743233 is an equidigital number, since it uses as much as digits as its factorization.

78772743233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8297856, while the sum is 53.

The spelling of 78772743233 in words is "seventy-eight billion, seven hundred seventy-two million, seven hundred forty-three thousand, two hundred thirty-three".