10644769538 has 48 divisors (see below), whose sum is σ = 18802086120. Its totient is φ = 4498910208.

The previous prime is 10644769537. The next prime is 10644769549. The reversal of 10644769538 is 83596744601.

It can be written as a sum of positive squares in 12 ways, for example, as 2351571049 + 8293198489 = 48493^2 + 91067^2 .

It is a super-2 number, since 2×10644769538² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10644769538.

It is not an unprimeable number, because it can be changed into a prime (10644769537) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 187568 + ... + 237636.

Almost surely, 2^10644769538 is an apocalyptic number.

10644769538 is a deficient number, since it is larger than the sum of its proper divisors (8157316582).

10644769538 is a wasteful number, since it uses less digits than its factorization.

10644769538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50151 (or 50138 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 53.

The spelling of 10644769538 in words is "ten billion, six hundred forty-four million, seven hundred sixty-nine thousand, five hundred thirty-eight".