7890011685 has 32 divisors (see below), whose sum is σ = 14291354880. Its totient is φ = 4128606144.

The previous prime is 7890011681. The next prime is 7890011749. The reversal of 7890011685 is 5861100987.

It is not a de Polignac number, because 7890011685 - 2² = 7890011681 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 7890011685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7890011681) 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 31 ways as a sum of consecutive naturals, for example, 544209 + ... + 558518.

It is an arithmetic number, because the mean of its divisors is an integer number (446604840).

Almost surely, 2^7890011685 is an apocalyptic number.

It is an amenable number.

7890011685 is a deficient number, since it is larger than the sum of its proper divisors (6401343195).

7890011685 is a wasteful number, since it uses less digits than its factorization.

7890011685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102794 (or 1102788 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 7890011685 is about 88825.7377396889. The cubic root of 7890011685 is about 1990.7919783122.

The spelling of 7890011685 in words is "seven billion, eight hundred ninety million, eleven thousand, six hundred eighty-five".