7911707085 has 12 divisors (see below), whose sum is σ = 13713625692. Its totient is φ = 4219577088.

The previous prime is 7911707059. The next prime is 7911707087. The reversal of 7911707085 is 5807071197.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2942303049 + 4969404036 = 54243^2 + 70494^2 .

It is not a de Polignac number, because 7911707085 - 2¹¹ = 7911705037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 175815713 = 7911707085 / (7 + 9 + 1 + 1 + 7 + 0 + 7 + 0 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 7911707085.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7911707087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87907812 + ... + 87907901.

It is an arithmetic number, because the mean of its divisors is an integer number (1142802141).

Almost surely, 2^7911707085 is an apocalyptic number.

It is an amenable number.

7911707085 is a deficient number, since it is larger than the sum of its proper divisors (5801918607).

7911707085 is a wasteful number, since it uses less digits than its factorization.

7911707085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175815724 (or 175815721 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 45.

The square root of 7911707085 is about 88947.7772909475. Note that the first 3 decimals coincide. The cubic root of 7911707085 is about 1992.6150216945.

The spelling of 7911707085 in words is "seven billion, nine hundred eleven million, seven hundred seven thousand, eighty-five".