6905397638 has 16 divisors (see below), whose sum is σ = 10580958720. Its totient is φ = 3378445896.

The previous prime is 6905397619. The next prime is 6905397659. The reversal of 6905397638 is 8367935096.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 736343 + ... + 745661.

It is an arithmetic number, because the mean of its divisors is an integer number (661309920).

Almost surely, 2^6905397638 is an apocalyptic number.

6905397638 is a deficient number, since it is larger than the sum of its proper divisors (3675561082).

6905397638 is a wasteful number, since it uses less digits than its factorization.

6905397638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17251.

The product of its (nonzero) digits is 7348320, while the sum is 56.

The square root of 6905397638 is about 83098.7222404773. The cubic root of 6905397638 is about 1904.2745531496.

The spelling of 6905397638 in words is "six billion, nine hundred five million, three hundred ninety-seven thousand, six hundred thirty-eight".