7685128412 has 24 divisors (see below), whose sum is σ = 14982945600. Its totient is φ = 3424671936.

The previous prime is 7685128387. The next prime is 7685128459. The reversal of 7685128412 is 2148215867.

It is a super-2 number, since 2×7685128412² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2546612 + ... + 2549627.

It is an arithmetic number, because the mean of its divisors is an integer number (624289400).

Almost surely, 2^7685128412 is an apocalyptic number.

It is an amenable number.

7685128412 is a deficient number, since it is larger than the sum of its proper divisors (7297817188).

7685128412 is a wasteful number, since it uses less digits than its factorization.

7685128412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096285 (or 5096283 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 7685128412 is about 87664.8641817233. The cubic root of 7685128412 is about 1973.4087197912.

The spelling of 7685128412 in words is "seven billion, six hundred eighty-five million, one hundred twenty-eight thousand, four hundred twelve".