10643632257064 has 16 divisors (see below), whose sum is σ = 19958181642900. Its totient is φ = 5321450485632.

The previous prime is 10643632257053. The next prime is 10643632257073. The reversal of 10643632257064 is 46075223634601.

10643632257064 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 9620803434564 + 1022828822500 = 3101742^2 + 1011350^2 .

It is a super-2 number, since 2×10643632257064² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10643632256999 and 10643632257017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45581629 + ... + 45814540.

Almost surely, 2^{10643632257064} is an apocalyptic number.

It is an amenable number.

10643632257064 is a deficient number, since it is larger than the sum of its proper divisors (9314549385836).

10643632257064 is a wasteful number, since it uses less digits than its factorization.

10643632257064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91410732 (or 91410728 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 49.

The spelling of 10643632257064 in words is "ten trillion, six hundred forty-three billion, six hundred thirty-two million, two hundred fifty-seven thousand, sixty-four".