78148471450811 has 2 divisors, whose sum is σ = 78148471450812. Its totient is φ = 78148471450810.

The previous prime is 78148471450729. The next prime is 78148471450813. The reversal of 78148471450811 is 11805417484187.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78148471450811 - 2¹⁴ = 78148471434427 is a prime.

It is a super-2 number, since 2×78148471450811² (a number of 29 digits) contains 22 as substring.

Together with 78148471450813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78148471450813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39074235725405 + 39074235725406.

It is an arithmetic number, because the mean of its divisors is an integer number (39074235725406).

Almost surely, 2^{78148471450811} is an apocalyptic number.

78148471450811 is a deficient number, since it is larger than the sum of its proper divisors (1).

78148471450811 is an equidigital number, since it uses as much as digits as its factorization.

78148471450811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8028160, while the sum is 59.

The spelling of 78148471450811 in words is "seventy-eight trillion, one hundred forty-eight billion, four hundred seventy-one million, four hundred fifty thousand, eight hundred eleven".