78105605280011 has 2 divisors, whose sum is σ = 78105605280012. Its totient is φ = 78105605280010.

The previous prime is 78105605279993. The next prime is 78105605280049. The reversal of 78105605280011 is 11008250650187.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78105605280011 - 2¹⁴ = 78105605263627 is a prime.

It is a super-2 number, since 2×78105605280011² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78105605289011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39052802640005 + 39052802640006.

It is an arithmetic number, because the mean of its divisors is an integer number (39052802640006).

Almost surely, 2^{78105605280011} is an apocalyptic number.

78105605280011 is a deficient number, since it is larger than the sum of its proper divisors (1).

78105605280011 is an equidigital number, since it uses as much as digits as its factorization.

78105605280011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 44.

The spelling of 78105605280011 in words is "seventy-eight trillion, one hundred five billion, six hundred five million, two hundred eighty thousand, eleven".