9378786811 has 4 divisors (see below), whose sum is σ = 9378991512. Its totient is φ = 9378582112.

The previous prime is 9378786761. The next prime is 9378786827. The reversal of 9378786811 is 1186878739.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1186878739 = 463 ⋅2563453.

It is a cyclic number.

It is not a de Polignac number, because 9378786811 - 2²⁷ = 9244569083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9378786871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1500 + ... + 136966.

It is an arithmetic number, because the mean of its divisors is an integer number (2344747878).

Almost surely, 2^9378786811 is an apocalyptic number.

9378786811 is a deficient number, since it is larger than the sum of its proper divisors (204701).

9378786811 is a wasteful number, since it uses less digits than its factorization.

9378786811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204700.

The product of its digits is 4064256, while the sum is 58.

The square root of 9378786811 is about 96844.1366888053. The cubic root of 9378786811 is about 2108.8655290459.

The spelling of 9378786811 in words is "nine billion, three hundred seventy-eight million, seven hundred eighty-six thousand, eight hundred eleven".