78278799107 has 2 divisors, whose sum is σ = 78278799108. Its totient is φ = 78278799106.

The previous prime is 78278799101. The next prime is 78278799139. The reversal of 78278799107 is 70199787287.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 78278799107 - 2⁴ = 78278799091 is a prime.

It is a super-2 number, since 2×78278799107² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78278799101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39139399553 + 39139399554.

It is an arithmetic number, because the mean of its divisors is an integer number (39139399554).

Almost surely, 2^78278799107 is an apocalyptic number.

78278799107 is a deficient number, since it is larger than the sum of its proper divisors (1).

78278799107 is an equidigital number, since it uses as much as digits as its factorization.

78278799107 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24893568, while the sum is 65.

The spelling of 78278799107 in words is "seventy-eight billion, two hundred seventy-eight million, seven hundred ninety-nine thousand, one hundred seven".