6512716977781 has 32 divisors (see below), whose sum is σ = 8068731390720. Its totient is φ = 5128895794176.

The previous prime is 6512716977769. The next prime is 6512716977797. The reversal of 6512716977781 is 1877796172156.

It is not a de Polignac number, because 6512716977781 - 2⁷ = 6512716977653 is a prime.

It is a super-2 number, since 2×6512716977781² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6512716977731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8798595 + ... + 9510031.

It is an arithmetic number, because the mean of its divisors is an integer number (252147855960).

Almost surely, 2^{6512716977781} is an apocalyptic number.

It is an amenable number.

6512716977781 is a deficient number, since it is larger than the sum of its proper divisors (1556014412939).

6512716977781 is a wasteful number, since it uses less digits than its factorization.

6512716977781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713293.

The product of its digits is 62233920, while the sum is 67.

The spelling of 6512716977781 in words is "six trillion, five hundred twelve billion, seven hundred sixteen million, nine hundred seventy-seven thousand, seven hundred eighty-one".