6645116086500 has 96 divisors (see below), whose sum is σ = 19595522419200. Its totient is φ = 1749600153600.

The previous prime is 6645116086489. The next prime is 6645116086517. The reversal of 6645116086500 is 56806115466.

It is a super-2 number, since 2×6645116086500² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6645116086500.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27919965 + ... + 28156964.

It is an arithmetic number, because the mean of its divisors is an integer number (204120025200).

Almost surely, 2^{6645116086500} is an apocalyptic number.

6645116086500 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6645116086500 is an abundant number, since it is smaller than the sum of its proper divisors (12950406332700).

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

6645116086500 is a wasteful number, since it uses less digits than its factorization.

6645116086500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56077030 (or 56077018 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 6645116086500 in words is "six trillion, six hundred forty-five billion, one hundred sixteen million, eighty-six thousand, five hundred".