646020646 has 8 divisors (see below), whose sum is σ = 1002445920. Its totient is φ = 311872008.

The previous prime is 646020631. The next prime is 646020647.

646020646 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646020647) 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, 5569086 + ... + 5569201.

It is an arithmetic number, because the mean of its divisors is an integer number (125305740).

Almost surely, 2^646020646 is an apocalyptic number.

646020646 is a deficient number, since it is larger than the sum of its proper divisors (356425274).

646020646 is a wasteful number, since it uses less digits than its factorization.

646020646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11138318.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 646020646 is about 25416.9362040353. The cubic root of 646020646 is about 864.4677563704.

The spelling of 646020646 in words is "six hundred forty-six million, twenty thousand, six hundred forty-six".