6534925991 has 16 divisors (see below), whose sum is σ = 7449781248. Its totient is φ = 5674284000.

The previous prime is 6534925979. The next prime is 6534925997. The reversal of 6534925991 is 1995294356.

It is not a de Polignac number, because 6534925991 - 2²² = 6530731687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6534925997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158930 + ... + 195776.

It is an arithmetic number, because the mean of its divisors is an integer number (465611328).

Almost surely, 2^6534925991 is an apocalyptic number.

6534925991 is a deficient number, since it is larger than the sum of its proper divisors (914855257).

6534925991 is a wasteful number, since it uses less digits than its factorization.

6534925991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37582.

The product of its digits is 2624400, while the sum is 53.

The square root of 6534925991 is about 80838.8891004818. The cubic root of 6534925991 is about 1869.5922157904.

The spelling of 6534925991 in words is "six billion, five hundred thirty-four million, nine hundred twenty-five thousand, nine hundred ninety-one".