78213723446303 has 2 divisors, whose sum is σ = 78213723446304. Its totient is φ = 78213723446302.

The previous prime is 78213723446297. The next prime is 78213723446323. The reversal of 78213723446303 is 30364432731287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78213723446303 - 2²² = 78213719251999 is a prime.

It is a super-2 number, since 2×78213723446303² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78213723446323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39106861723151 + 39106861723152.

It is an arithmetic number, because the mean of its divisors is an integer number (39106861723152).

Almost surely, 2^{78213723446303} is an apocalyptic number.

78213723446303 is a deficient number, since it is larger than the sum of its proper divisors (1).

78213723446303 is an equidigital number, since it uses as much as digits as its factorization.

78213723446303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12192768, while the sum is 53.

The spelling of 78213723446303 in words is "seventy-eight trillion, two hundred thirteen billion, seven hundred twenty-three million, four hundred forty-six thousand, three hundred three".