6821712825 has 24 divisors (see below), whose sum is σ = 11942012448. Its totient is φ = 3424231680.

The previous prime is 6821712787. The next prime is 6821712847. The reversal of 6821712825 is 5282171286.

It is not a de Polignac number, because 6821712825 - 2¹³ = 6821704633 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2673907 + ... + 2676456.

It is an arithmetic number, because the mean of its divisors is an integer number (497583852).

Almost surely, 2^6821712825 is an apocalyptic number.

It is an amenable number.

6821712825 is a deficient number, since it is larger than the sum of its proper divisors (5120299623).

6821712825 is a wasteful number, since it uses less digits than its factorization.

6821712825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350393 (or 5350388 counting only the distinct ones).

The product of its digits is 107520, while the sum is 42.

The square root of 6821712825 is about 82593.6609250371. The cubic root of 6821712825 is about 1896.5507897361.

The spelling of 6821712825 in words is "six billion, eight hundred twenty-one million, seven hundred twelve thousand, eight hundred twenty-five".