6825979557 has 12 divisors (see below), whose sum is σ = 9860638944. Its totient is φ = 4550241960.

The previous prime is 6825979513. The next prime is 6825979579. The reversal of 6825979557 is 7559795286.

6825979557 is a `hidden beast` number, since 6 + 8 + 2 + 5 + 9 + 79 + 557 = 666.

It is not a de Polignac number, because 6825979557 - 2⁶ = 6825979493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6825979494 and 6825979503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6825979597) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 97632 + ... + 152262.

It is an arithmetic number, because the mean of its divisors is an integer number (821719912).

Almost surely, 2^6825979557 is an apocalyptic number.

It is an amenable number.

6825979557 is a deficient number, since it is larger than the sum of its proper divisors (3034659387).

6825979557 is a wasteful number, since it uses less digits than its factorization.

6825979557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68520 (or 68517 counting only the distinct ones).

The product of its digits is 47628000, while the sum is 63.

The square root of 6825979557 is about 82619.4865452455. The cubic root of 6825979557 is about 1896.9461150568.

The spelling of 6825979557 in words is "six billion, eight hundred twenty-five million, nine hundred seventy-nine thousand, five hundred fifty-seven".