646775545066000 has 320 divisors, whose sum is σ = 1924529914344960. Its totient is φ = 205169984716800.

The previous prime is 646775545065907. The next prime is 646775545066039. The reversal of 646775545066000 is 660545577646.

It is a self number, because there is not a number n which added to its sum of digits gives 646775545066000.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8988037 + ... + 37072036.

It is an arithmetic number, because the mean of its divisors is an integer number (6014155982328).

Almost surely, 2^{646775545066000} is an apocalyptic number.

It is an amenable number.

646775545066000 is an abundant number, since it is smaller than the sum of its proper divisors (1277754369278960).

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

646775545066000 is a wasteful number, since it uses less digits than its factorization.

646775545066000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46060179 (or 46060163 counting only the distinct ones).

The product of its (nonzero) digits is 127008000, while the sum is 61.

The spelling of 646775545066000 in words is "six hundred forty-six trillion, seven hundred seventy-five billion, five hundred forty-five million, sixty-six thousand".