10643657072644 has 6 divisors (see below), whose sum is σ = 18626399877134. Its totient is φ = 5321828536320.

The previous prime is 10643657072617. The next prime is 10643657072693. The reversal of 10643657072644 is 44627075634601.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 7915669710400 + 2727987362244 = 2813480^2 + 1651662^2 .

It is a super-2 number, since 2×10643657072644² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330457134077 + ... + 1330457134084.

Almost surely, 2^{10643657072644} is an apocalyptic number.

It is an amenable number.

10643657072644 is a deficient number, since it is larger than the sum of its proper divisors (7982742804490).

10643657072644 is a wasteful number, since it uses less digits than its factorization.

10643657072644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660914268165 (or 2660914268163 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 55.

The spelling of 10643657072644 in words is "ten trillion, six hundred forty-three billion, six hundred fifty-seven million, seventy-two thousand, six hundred forty-four".