6820687542 has 16 divisors (see below), whose sum is σ = 13684961520. Its totient is φ = 2266298112.

The previous prime is 6820687529. The next prime is 6820687547. The reversal of 6820687542 is 2457860286.

It is a junction number, because it is equal to n+sod(n) for n = 6820687491 and 6820687500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6820687547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814067 + ... + 1817822.

It is an arithmetic number, because the mean of its divisors is an integer number (855310095).

Almost surely, 2^6820687542 is an apocalyptic number.

6820687542 is an abundant number, since it is smaller than the sum of its proper divisors (6864273978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6820687542 is a wasteful number, since it uses less digits than its factorization.

6820687542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3632207.

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 6820687542 is about 82587.4539019093. The cubic root of 6820687542 is about 1896.4557696750.

The spelling of 6820687542 in words is "six billion, eight hundred twenty million, six hundred eighty-seven thousand, five hundred forty-two".