2078378311 has 2 divisors, whose sum is σ = 2078378312. Its totient is φ = 2078378310.

The previous prime is 2078378287. The next prime is 2078378317. The reversal of 2078378311 is 1138738702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2078378311 - 2⁹ = 2078377799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2078378317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1039189155 + 1039189156.

It is an arithmetic number, because the mean of its divisors is an integer number (1039189156).

Almost surely, 2^2078378311 is an apocalyptic number.

2078378311 is a deficient number, since it is larger than the sum of its proper divisors (1).

2078378311 is an equidigital number, since it uses as much as digits as its factorization.

2078378311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 2078378311 is about 45589.2345954612. The cubic root of 2078378311 is about 1276.1690287427.

The spelling of 2078378311 in words is "two billion, seventy-eight million, three hundred seventy-eight thousand, three hundred eleven".