6425136686 has 4 divisors (see below), whose sum is σ = 9637705032. Its totient is φ = 3212568342.

The previous prime is 6425136661. The next prime is 6425136703. The reversal of 6425136686 is 6866315246.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 6425136686.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1606284170 + ... + 1606284173.

It is an arithmetic number, because the mean of its divisors is an integer number (2409426258).

Almost surely, 2^6425136686 is an apocalyptic number.

6425136686 is a deficient number, since it is larger than the sum of its proper divisors (3212568346).

6425136686 is a wasteful number, since it uses less digits than its factorization.

6425136686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3212568345.

The product of its digits is 1244160, while the sum is 47.

The square root of 6425136686 is about 80156.9503287145. The cubic root of 6425136686 is about 1859.0630697658.

The spelling of 6425136686 in words is "six billion, four hundred twenty-five million, one hundred thirty-six thousand, six hundred eighty-six".