7681657625 has 16 divisors (see below), whose sum is σ = 9613468800. Its totient is φ = 6128172400.

The previous prime is 7681657609. The next prime is 7681657639. The reversal of 7681657625 is 5267561867.

It is not a de Polignac number, because 7681657625 - 2⁴ = 7681657609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40715 + ... + 130464.

It is an arithmetic number, because the mean of its divisors is an integer number (600841800).

Almost surely, 2^7681657625 is an apocalyptic number.

It is an amenable number.

7681657625 is a deficient number, since it is larger than the sum of its proper divisors (1931811175).

7681657625 is a wasteful number, since it uses less digits than its factorization.

7681657625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171553 (or 171543 counting only the distinct ones).

The product of its digits is 4233600, while the sum is 53.

The square root of 7681657625 is about 87645.0661760261. The cubic root of 7681657625 is about 1973.1115956001. Note that the first 3 decimals are identical.

The spelling of 7681657625 in words is "seven billion, six hundred eighty-one million, six hundred fifty-seven thousand, six hundred twenty-five".