10643351216464 has 20 divisors (see below), whose sum is σ = 20621558926804. Its totient is φ = 5321658590208.

The previous prime is 10643351216369. The next prime is 10643351216467. The reversal of 10643351216464 is 46461215334601.

It can be written as a sum of positive squares in 2 ways, for example, as 7259252490000 + 3384098726464 = 2694300^2 + 1839592^2 .

It is a super-2 number, since 2×10643351216464² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10643351216467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5221504 + ... + 6967840.

Almost surely, 2^{10643351216464} is an apocalyptic number.

It is an amenable number.

10643351216464 is a deficient number, since it is larger than the sum of its proper divisors (9978207710340).

10643351216464 is a wasteful number, since it uses less digits than its factorization.

10643351216464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127262 (or 2127256 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 10643351216464 in words is "ten trillion, six hundred forty-three billion, three hundred fifty-one million, two hundred sixteen thousand, four hundred sixty-four".