646356345 has 16 divisors (see below), whose sum is σ = 1088600640. Its totient is φ = 326579904.

The previous prime is 646356331. The next prime is 646356353. The reversal of 646356345 is 543653646.

It is a happy number.

It is not a de Polignac number, because 646356345 - 2⁴ = 646356329 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 646356297 and 646356306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1133674 + ... + 1134243.

It is an arithmetic number, because the mean of its divisors is an integer number (68037540).

Almost surely, 2^646356345 is an apocalyptic number.

It is an amenable number.

646356345 is a deficient number, since it is larger than the sum of its proper divisors (442244295).

646356345 is a wasteful number, since it uses less digits than its factorization.

646356345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2267944.

The product of its digits is 777600, while the sum is 42.

The square root of 646356345 is about 25423.5391910725. The cubic root of 646356345 is about 864.6174681538.

The spelling of 646356345 in words is "six hundred forty-six million, three hundred fifty-six thousand, three hundred forty-five".