78291045113 has 2 divisors, whose sum is σ = 78291045114. Its totient is φ = 78291045112.

The previous prime is 78291044983. The next prime is 78291045187. The reversal of 78291045113 is 31154019287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74636600809 + 3654444304 = 273197^2 + 60452^2 .

It is a cyclic number.

It is not a de Polignac number, because 78291045113 - 2⁸ = 78291044857 is a prime.

It is a super-2 number, since 2×78291045113² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (78291042113) 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, 39145522556 + 39145522557.

It is an arithmetic number, because the mean of its divisors is an integer number (39145522557).

Almost surely, 2^78291045113 is an apocalyptic number.

It is an amenable number.

78291045113 is a deficient number, since it is larger than the sum of its proper divisors (1).

78291045113 is an equidigital number, since it uses as much as digits as its factorization.

78291045113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 78291045113 in words is "seventy-eight billion, two hundred ninety-one million, forty-five thousand, one hundred thirteen".