6899564238 has 32 divisors (see below), whose sum is σ = 15777565440. Its totient is φ = 1970412480.

The previous prime is 6899564237. The next prime is 6899564249. The reversal of 6899564238 is 8324659986.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6899564237) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 59793 + ... + 131811.

It is an arithmetic number, because the mean of its divisors is an integer number (493048920).

Almost surely, 2^6899564238 is an apocalyptic number.

6899564238 is an abundant number, since it is smaller than the sum of its proper divisors (8878001202).

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

6899564238 is a wasteful number, since it uses less digits than its factorization.

6899564238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74312.

The product of its digits is 22394880, while the sum is 60.

The square root of 6899564238 is about 83063.6156087610. The cubic root of 6899564238 is about 1903.7381841040.

The spelling of 6899564238 in words is "six billion, eight hundred ninety-nine million, five hundred sixty-four thousand, two hundred thirty-eight".