6511891062 has 16 divisors (see below), whose sum is σ = 13443904512. Its totient is φ = 2100609960.

The previous prime is 6511891049. The next prime is 6511891063. The reversal of 6511891062 is 2601981156.

It is a self number, because there is not a number n which added to its sum of digits gives 6511891062.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6511891063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17504898 + ... + 17505269.

It is an arithmetic number, because the mean of its divisors is an integer number (840244032).

Almost surely, 2^6511891062 is an apocalyptic number.

6511891062 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

6511891062 is an abundant number, since it is smaller than the sum of its proper divisors (6932013450).

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

6511891062 is a wasteful number, since it uses less digits than its factorization.

6511891062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35010203.

The product of its (nonzero) digits is 25920, while the sum is 39.

The square root of 6511891062 is about 80696.2890224823. The cubic root of 6511891062 is about 1867.3929241540.

The spelling of 6511891062 in words is "six billion, five hundred eleven million, eight hundred ninety-one thousand, sixty-two".