78650262149 has 2 divisors, whose sum is σ = 78650262150. Its totient is φ = 78650262148.

The previous prime is 78650262133. The next prime is 78650262199. The reversal of 78650262149 is 94126205687.

It is an a-pointer prime, because the next prime (78650262199) can be obtained adding 78650262149 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55404685924 + 23245576225 = 235382^2 + 152465^2 .

It is an emirp because it is prime and its reverse (94126205687) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78650262149 - 2⁴ = 78650262133 is a prime.

It is a super-2 number, since 2×78650262149² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78650262097 and 78650262106.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (78650262199) 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, 39325131074 + 39325131075.

It is an arithmetic number, because the mean of its divisors is an integer number (39325131075).

Almost surely, 2^78650262149 is an apocalyptic number.

It is an amenable number.

78650262149 is a deficient number, since it is larger than the sum of its proper divisors (1).

78650262149 is an equidigital number, since it uses as much as digits as its factorization.

78650262149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 78650262149 in words is "seventy-eight billion, six hundred fifty million, two hundred sixty-two thousand, one hundred forty-nine".