7778441201 has 2 divisors, whose sum is σ = 7778441202. Its totient is φ = 7778441200.

The previous prime is 7778441159. The next prime is 7778441221. The reversal of 7778441201 is 1021448777.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6864951025 + 913490176 = 82855^2 + 30224^2 .

It is a cyclic number.

It is not a de Polignac number, because 7778441201 - 2¹⁰ = 7778440177 is a prime.

It is not a weakly prime, because it can be changed into another prime (7778441221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3889220600 + 3889220601.

It is an arithmetic number, because the mean of its divisors is an integer number (3889220601).

Almost surely, 2^7778441201 is an apocalyptic number.

It is an amenable number.

7778441201 is a deficient number, since it is larger than the sum of its proper divisors (1).

7778441201 is an equidigital number, since it uses as much as digits as its factorization.

7778441201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87808, while the sum is 41.

The square root of 7778441201 is about 88195.4715447454. The cubic root of 7778441201 is about 1981.3636493554.

Adding to 7778441201 its reverse (1021448777), we get a palindrome (8799889978).

The spelling of 7778441201 in words is "seven billion, seven hundred seventy-eight million, four hundred forty-one thousand, two hundred one".