78047944954823 has 2 divisors, whose sum is σ = 78047944954824. Its totient is φ = 78047944954822.

The previous prime is 78047944954783. The next prime is 78047944954867. The reversal of 78047944954823 is 32845944974087.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78047944954823 - 2¹⁰ = 78047944953799 is a prime.

It is a super-2 number, since 2×78047944954823² (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 (78047944954223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39023972477411 + 39023972477412.

It is an arithmetic number, because the mean of its divisors is an integer number (39023972477412).

Almost surely, 2^{78047944954823} is an apocalyptic number.

78047944954823 is a deficient number, since it is larger than the sum of its proper divisors (1).

78047944954823 is an equidigital number, since it uses as much as digits as its factorization.

78047944954823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1950842880, while the sum is 74.

The spelling of 78047944954823 in words is "seventy-eight trillion, forty-seven billion, nine hundred forty-four million, nine hundred fifty-four thousand, eight hundred twenty-three".