8078388961 has 2 divisors, whose sum is σ = 8078388962. Its totient is φ = 8078388960.

The previous prime is 8078388919. The next prime is 8078388971. The reversal of 8078388961 is 1698838708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4976455936 + 3101933025 = 70544^2 + 55695^2 .

It is a cyclic number.

It is not a de Polignac number, because 8078388961 - 2¹³ = 8078380769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8078388896 and 8078388905.

It is not a weakly prime, because it can be changed into another prime (8078388971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4039194480 + 4039194481.

It is an arithmetic number, because the mean of its divisors is an integer number (4039194481).

Almost surely, 2^8078388961 is an apocalyptic number.

It is an amenable number.

8078388961 is a deficient number, since it is larger than the sum of its proper divisors (1).

8078388961 is an equidigital number, since it uses as much as digits as its factorization.

8078388961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4644864, while the sum is 58.

The square root of 8078388961 is about 89879.8584834222. The cubic root of 8078388961 is about 2006.5111925983.

It can be divided in two parts, 80783 and 88961, that added together give a square (169744 = 412²).

The spelling of 8078388961 in words is "eight billion, seventy-eight million, three hundred eighty-eight thousand, nine hundred sixty-one".