36432221643 has 12 divisors (see below), whose sum is σ = 54046599568. Its totient is φ = 23631711120.

The previous prime is 36432221599. The next prime is 36432221653. The reversal of 36432221643 is 34612223463.

36432221643 is a `hidden beast` number, since 3 + 6 + 4 + 3 + 2 + 2 + 2 + 1 + 643 = 666.

It is not a de Polignac number, because 36432221643 - 2²⁰ = 36431173067 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 36432221598 and 36432221607.

It is not an unprimeable number, because it can be changed into a prime (36432221653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54702703 + ... + 54703368.

Almost surely, 2^36432221643 is an apocalyptic number.

36432221643 is a deficient number, since it is larger than the sum of its proper divisors (17614377925).

36432221643 is a wasteful number, since it uses less digits than its factorization.

36432221643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109406114 (or 109406111 counting only the distinct ones).

The product of its digits is 124416, while the sum is 36.

The spelling of 36432221643 in words is "thirty-six billion, four hundred thirty-two million, two hundred twenty-one thousand, six hundred forty-three".