6494698687728 has 20 divisors (see below), whose sum is σ = 16777971610088. Its totient is φ = 2164899562560.

The previous prime is 6494698687721. The next prime is 6494698687769. The reversal of 6494698687728 is 8277868964946.

It is a super-2 number, since 2×6494698687728² (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 (6494698687721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67653111283 + ... + 67653111378.

Almost surely, 2^{6494698687728} is an apocalyptic number.

It is an amenable number.

6494698687728 is an abundant number, since it is smaller than the sum of its proper divisors (10283272922360).

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

6494698687728 is a wasteful number, since it uses less digits than its factorization.

6494698687728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135306222672 (or 135306222666 counting only the distinct ones).

The product of its digits is 14046068736, while the sum is 84.

The spelling of 6494698687728 in words is "six trillion, four hundred ninety-four billion, six hundred ninety-eight million, six hundred eighty-seven thousand, seven hundred twenty-eight".