8378411081 has 2 divisors, whose sum is σ = 8378411082. Its totient is φ = 8378411080.

The previous prime is 8378411023. The next prime is 8378411117. The reversal of 8378411081 is 1801148738.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6193690000 + 2184721081 = 78700^2 + 46741^2 .

It is a cyclic number.

It is not a de Polignac number, because 8378411081 - 2¹⁰ = 8378410057 is a prime.

It is a super-3 number, since 3×8378411081³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (8378411681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4189205540 + 4189205541.

It is an arithmetic number, because the mean of its divisors is an integer number (4189205541).

Almost surely, 2^8378411081 is an apocalyptic number.

It is an amenable number.

8378411081 is a deficient number, since it is larger than the sum of its proper divisors (1).

8378411081 is an equidigital number, since it uses as much as digits as its factorization.

8378411081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 41.

The square root of 8378411081 is about 91533.6609177192. The cubic root of 8378411081 is about 2031.0497196570.

The spelling of 8378411081 in words is "eight billion, three hundred seventy-eight million, four hundred eleven thousand, eighty-one".