6538440447870 has 32 divisors (see below), whose sum is σ = 16026134888448. Its totient is φ = 1706486584608.

The previous prime is 6538440447853. The next prime is 6538440447887. The reversal of 6538440447870 is 787440448356.

It is an interprime number because it is at equal distance from previous prime (6538440447853) and next prime (6538440447887).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2318594494 + ... + 2318597313.

It is an arithmetic number, because the mean of its divisors is an integer number (500816715264).

Almost surely, 2^{6538440447870} is an apocalyptic number.

6538440447870 is an abundant number, since it is smaller than the sum of its proper divisors (9487694440578).

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

6538440447870 is a wasteful number, since it uses less digits than its factorization.

6538440447870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4637191864.

The product of its (nonzero) digits is 72253440, while the sum is 60.

The spelling of 6538440447870 in words is "six trillion, five hundred thirty-eight billion, four hundred forty million, four hundred forty-seven thousand, eight hundred seventy".