6478528686757 has 16 divisors (see below), whose sum is σ = 6724168381440. Its totient is φ = 6235199308800.

The previous prime is 6478528686719. The next prime is 6478528686769. The reversal of 6478528686757 is 7576868258746.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6478528686757 is a prime.

It is a super-3 number, since 3×6478528686757³ (a number of 39 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6478528686797) 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, 20116632 + ... + 20436142.

It is an arithmetic number, because the mean of its divisors is an integer number (420260523840).

Almost surely, 2^{6478528686757} is an apocalyptic number.

It is an amenable number.

6478528686757 is a deficient number, since it is larger than the sum of its proper divisors (245639694683).

6478528686757 is a wasteful number, since it uses less digits than its factorization.

6478528686757 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323124.

The product of its digits is 7586611200, while the sum is 79.

The spelling of 6478528686757 in words is "six trillion, four hundred seventy-eight billion, five hundred twenty-eight million, six hundred eighty-six thousand, seven hundred fifty-seven".