6534139446745 has 8 divisors (see below), whose sum is σ = 7842628234440. Its totient is φ = 5226204291840.

The previous prime is 6534139446733. The next prime is 6534139446749. The reversal of 6534139446745 is 5476449314356.

It can be written as a sum of positive squares in 4 ways, for example, as 302206371289 + 6231933075456 = 549733^2 + 2496384^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6534139446745 - 2¹⁹ = 6534138922457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6534139446749) 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 7 ways as a sum of consecutive naturals, for example, 138382230 + ... + 138429439.

It is an arithmetic number, because the mean of its divisors is an integer number (980328529305).

Almost surely, 2^{6534139446745} is an apocalyptic number.

It is an amenable number.

6534139446745 is a deficient number, since it is larger than the sum of its proper divisors (1308488787695).

6534139446745 is a wasteful number, since it uses less digits than its factorization.

6534139446745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276816395.

The product of its digits is 130636800, while the sum is 61.

The spelling of 6534139446745 in words is "six trillion, five hundred thirty-four billion, one hundred thirty-nine million, four hundred forty-six thousand, seven hundred forty-five".