6499081960511 has 16 divisors (see below), whose sum is σ = 7635315207168. Its totient is φ = 5416946539200.

The previous prime is 6499081960507. The next prime is 6499081960517. The reversal of 6499081960511 is 1150691809946.

It is not a de Polignac number, because 6499081960511 - 2² = 6499081960507 is a prime.

It is a super-2 number, since 2×6499081960511² (a number of 26 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499081960517) 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, 89529635 + ... + 89602196.

It is an arithmetic number, because the mean of its divisors is an integer number (477207200448).

Almost surely, 2^{6499081960511} is an apocalyptic number.

6499081960511 is a deficient number, since it is larger than the sum of its proper divisors (1136233246657).

6499081960511 is a wasteful number, since it uses less digits than its factorization.

6499081960511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179131982.

The product of its (nonzero) digits is 4199040, while the sum is 59.

The spelling of 6499081960511 in words is "six trillion, four hundred ninety-nine billion, eighty-one million, nine hundred sixty thousand, five hundred eleven".