78213700723243 has 2 divisors, whose sum is σ = 78213700723244. Its totient is φ = 78213700723242.

The previous prime is 78213700723217. The next prime is 78213700723267. The reversal of 78213700723243 is 34232700731287.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78213700723243 is a prime.

It is a super-2 number, since 2×78213700723243² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78213700723043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39106850361621 + 39106850361622.

It is an arithmetic number, because the mean of its divisors is an integer number (39106850361622).

Almost surely, 2^{78213700723243} is an apocalyptic number.

78213700723243 is a deficient number, since it is larger than the sum of its proper divisors (1).

78213700723243 is an equidigital number, since it uses as much as digits as its factorization.

78213700723243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 49.

The spelling of 78213700723243 in words is "seventy-eight trillion, two hundred thirteen billion, seven hundred million, seven hundred twenty-three thousand, two hundred forty-three".