9765478791 has 12 divisors (see below), whose sum is σ = 14106741168. Its totient is φ = 6509834784.

The previous prime is 9765478771. The next prime is 9765478823. The reversal of 9765478791 is 1978745679.

9765478791 is a `hidden beast` number, since 9 + 7 + 6 + 547 + 87 + 9 + 1 = 666.

It is not a de Polignac number, because 9765478791 - 2⁶ = 9765478727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9765478741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 121446 + ... + 185148.

It is an arithmetic number, because the mean of its divisors is an integer number (1175561764).

Almost surely, 2^9765478791 is an apocalyptic number.

9765478791 is a deficient number, since it is larger than the sum of its proper divisors (4341262377).

9765478791 is a wasteful number, since it uses less digits than its factorization.

9765478791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80742 (or 80739 counting only the distinct ones).

The product of its digits is 26671680, while the sum is 63.

The square root of 9765478791 is about 98820.4371119659. The cubic root of 9765478791 is about 2137.4592660340.

The spelling of 9765478791 in words is "nine billion, seven hundred sixty-five million, four hundred seventy-eight thousand, seven hundred ninety-one".