201643452602 has 4 divisors (see below), whose sum is σ = 302465178906. Its totient is φ = 100821726300.

The previous prime is 201643452589. The next prime is 201643452709. The reversal of 201643452602 is 206254346102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 132926597281 + 68716855321 = 364591^2 + 262139^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50410863149 + ... + 50410863152.

Almost surely, 2^201643452602 is an apocalyptic number.

201643452602 is a deficient number, since it is larger than the sum of its proper divisors (100821726304).

201643452602 is a wasteful number, since it uses less digits than its factorization.

201643452602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100821726303.

The product of its (nonzero) digits is 69120, while the sum is 35.

Adding to 201643452602 its reverse (206254346102), we get a palindrome (407897798704).

The spelling of 201643452602 in words is "two hundred one billion, six hundred forty-three million, four hundred fifty-two thousand, six hundred two".