9778406811 has 16 divisors (see below), whose sum is σ = 13339408128. Its totient is φ = 6369588000.

The previous prime is 9778406797. The next prime is 9778406819. The reversal of 9778406811 is 1186048779.

9778406811 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9778406811 - 2⁷ = 9778406683 is a prime.

It is a super-2 number, since 2×9778406811² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9778406819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149301 + ... + 204566.

It is an arithmetic number, because the mean of its divisors is an integer number (833713008).

Almost surely, 2^9778406811 is an apocalyptic number.

9778406811 is a deficient number, since it is larger than the sum of its proper divisors (3561001317).

9778406811 is a wasteful number, since it uses less digits than its factorization.

9778406811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354082.

The product of its (nonzero) digits is 677376, while the sum is 51.

The square root of 9778406811 is about 98885.8271492937. The cubic root of 9778406811 is about 2138.4020745970.

The spelling of 9778406811 in words is "nine billion, seven hundred seventy-eight million, four hundred six thousand, eight hundred eleven".