10643537236 has 12 divisors (see below), whose sum is σ = 18818213428. Its totient is φ = 5266904832.

The previous prime is 10643537231. The next prime is 10643537243. The reversal of 10643537236 is 63273534601.

It can be written as a sum of positive squares in 2 ways, for example, as 7991287236 + 2652250000 = 89394^2 + 51500^2 .

It is a super-2 number, since 2×10643537236² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10643537231) 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, 13715511 + ... + 13716286.

Almost surely, 2^10643537236 is an apocalyptic number.

It is an amenable number.

10643537236 is a deficient number, since it is larger than the sum of its proper divisors (8174676192).

10643537236 is a wasteful number, since it uses less digits than its factorization.

10643537236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27431898 (or 27431896 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 40.

The spelling of 10643537236 in words is "ten billion, six hundred forty-three million, five hundred thirty-seven thousand, two hundred thirty-six".