6528640378546 has 64 divisors (see below), whose sum is σ = 12006031113216. Its totient is φ = 2620016308800.

The previous prime is 6528640378543. The next prime is 6528640378549. The reversal of 6528640378546 is 6458730468256.

It is an interprime number because it is at equal distance from previous prime (6528640378543) and next prime (6528640378549).

It is not an unprimeable number, because it can be changed into a prime (6528640378543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 153713205 + ... + 153755671.

It is an arithmetic number, because the mean of its divisors is an integer number (187594236144).

Almost surely, 2^{6528640378546} is an apocalyptic number.

6528640378546 is a deficient number, since it is larger than the sum of its proper divisors (5477390734670).

6528640378546 is a wasteful number, since it uses less digits than its factorization.

6528640378546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65887.

The product of its (nonzero) digits is 232243200, while the sum is 64.

The spelling of 6528640378546 in words is "six trillion, five hundred twenty-eight billion, six hundred forty million, three hundred seventy-eight thousand, five hundred forty-six".