64136768516200 has 24 divisors (see below), whose sum is σ = 149117986800630. Its totient is φ = 25654707406400.

The previous prime is 64136768516147. The next prime is 64136768516231. The reversal of 64136768516200 is 261586763146.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 61226462170756 + 2910306345444 = 7824734^2 + 1705962^2 .

It is a super-2 number, since 2×64136768516200² (a number of 28 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 160341921091 + ... + 160341921490.

Almost surely, 2^{64136768516200} is an apocalyptic number.

It is an amenable number.

64136768516200 is an abundant number, since it is smaller than the sum of its proper divisors (84981218284430).

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

64136768516200 is a wasteful number, since it uses less digits than its factorization.

64136768516200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320683842597 (or 320683842588 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 55.

The spelling of 64136768516200 in words is "sixty-four trillion, one hundred thirty-six billion, seven hundred sixty-eight million, five hundred sixteen thousand, two hundred".