646625043202 has 8 divisors (see below), whose sum is σ = 969952164300. Its totient is φ = 323307655104.

The previous prime is 646625043179. The next prime is 646625043257. The reversal of 646625043202 is 202340526646.

It can be written as a sum of positive squares in 2 ways, for example, as 438507515601 + 208117527601 = 662199^2 + 456199^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2264827 + ... + 2534302.

Almost surely, 2^646625043202 is an apocalyptic number.

646625043202 is a deficient number, since it is larger than the sum of its proper divisors (323327121098).

646625043202 is a wasteful number, since it uses less digits than its factorization.

646625043202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866500.

The product of its (nonzero) digits is 414720, while the sum is 40.

Adding to 646625043202 its reverse (202340526646), we get a palindrome (848965569848).

The spelling of 646625043202 in words is "six hundred forty-six billion, six hundred twenty-five million, forty-three thousand, two hundred two".