78000000101 has 2 divisors, whose sum is σ = 78000000102. Its totient is φ = 78000000100.

The previous prime is 78000000077. The next prime is 78000000131. The reversal of 78000000101 is 10100000087.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73102099876 + 4897900225 = 270374^2 + 69985^2 .

It is an emirp because it is prime and its reverse (10100000087) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78000000101 - 2²⁶ = 77932891237 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 78000000101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78000000131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39000000050 + 39000000051.

It is an arithmetic number, because the mean of its divisors is an integer number (39000000051).

Almost surely, 2^78000000101 is an apocalyptic number.

It is an amenable number.

78000000101 is a deficient number, since it is larger than the sum of its proper divisors (1).

78000000101 is an equidigital number, since it uses as much as digits as its factorization.

78000000101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 17.

Adding to 78000000101 its reverse (10100000087), we get a palindrome (88100000188).

The spelling of 78000000101 in words is "seventy-eight billion, one hundred one", and thus it is an aban number.