51651110066564 has 24 divisors (see below), whose sum is σ = 93507260799960. Its totient is φ = 24934767759104.

The previous prime is 51651110066561. The next prime is 51651110066603. The reversal of 51651110066564 is 46566001115615.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6225424206400 + 45425685860164 = 2495080^2 + 6739858^2 .

It is a super-2 number, since 2×51651110066564² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51651110066561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9607112 + ... + 13985664.

It is an arithmetic number, because the mean of its divisors is an integer number (3896135866665).

Almost surely, 2^{51651110066564} is an apocalyptic number.

It is an amenable number.

51651110066564 is a deficient number, since it is larger than the sum of its proper divisors (41856150733396).

51651110066564 is a wasteful number, since it uses less digits than its factorization.

51651110066564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4480279 (or 4480277 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 47.

The spelling of 51651110066564 in words is "fifty-one trillion, six hundred fifty-one billion, one hundred ten million, sixty-six thousand, five hundred sixty-four".