10643429889 has 21 divisors (see below), whose sum is σ = 15962022259. Its totient is φ = 7093762920.

The previous prime is 10643429869. The next prime is 10643429897. The reversal of 10643429889 is 98892434601.

The square root of 10643429889 is 103167.

It is a perfect power (a square), and thus also a powerful number.

10643429889 is a `hidden beast` number, since 106 + 434 + 29 + 8 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9558386289 + 1085043600 = 97767^2 + 32940^2 .

It is not a de Polignac number, because 10643429889 - 2¹³ = 10643421697 is a prime.

It is a super-2 number, since 2×10643429889² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10643429869) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 2783599 + ... + 2787419.

Almost surely, 2^10643429889 is an apocalyptic number.

10643429889 is the 103167-th square number.

10643429889 is the 51584-th centered octagonal number.

It is an amenable number.

10643429889 is a deficient number, since it is larger than the sum of its proper divisors (5318592370).

10643429889 is an frugal number, since it uses more digits than its factorization.

10643429889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7660 (or 3824 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 10643429889 in words is "ten billion, six hundred forty-three million, four hundred twenty-nine thousand, eight hundred eighty-nine".