9778448831 has 2 divisors, whose sum is σ = 9778448832. Its totient is φ = 9778448830.

The previous prime is 9778448767. The next prime is 9778448851. The reversal of 9778448831 is 1388448779.

9778448831 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9778448831 - 2⁶ = 9778448767 is a prime.

It is a super-2 number, since 2×9778448831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9778448851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4889224415 + 4889224416.

It is an arithmetic number, because the mean of its divisors is an integer number (4889224416).

Almost surely, 2^9778448831 is an apocalyptic number.

9778448831 is a deficient number, since it is larger than the sum of its proper divisors (1).

9778448831 is an equidigital number, since it uses as much as digits as its factorization.

9778448831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10838016, while the sum is 59.

The square root of 9778448831 is about 98886.0396163179. The cubic root of 9778448831 is about 2138.4051376565.

The spelling of 9778448831 in words is "nine billion, seven hundred seventy-eight million, four hundred forty-eight thousand, eight hundred thirty-one".