7685716091 has 4 divisors (see below), whose sum is σ = 7719278400. Its totient is φ = 7652153784.

The previous prime is 7685716067. The next prime is 7685716117. The reversal of 7685716091 is 1906175867.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1906175867 = 25903 ⋅73589.

It is a cyclic number.

It is not a de Polignac number, because 7685716091 - 2¹⁸ = 7685453947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7685716001) 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, 16780811 + ... + 16781268.

It is an arithmetic number, because the mean of its divisors is an integer number (1929819600).

Almost surely, 2^7685716091 is an apocalyptic number.

7685716091 is a deficient number, since it is larger than the sum of its proper divisors (33562309).

7685716091 is a wasteful number, since it uses less digits than its factorization.

7685716091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33562308.

The product of its (nonzero) digits is 635040, while the sum is 50.

The square root of 7685716091 is about 87668.2159679322. The cubic root of 7685716091 is about 1973.4590204602.

The spelling of 7685716091 in words is "seven billion, six hundred eighty-five million, seven hundred sixteen thousand, ninety-one".