646792450 has 12 divisors (see below), whose sum is σ = 1203034050. Its totient is φ = 258716960.

The previous prime is 646792441. The next prime is 646792493. The reversal of 646792450 is 54297646.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 531809721 + 114982729 = 23061^2 + 10723^2 .

It is a junction number, because it is equal to n+sod(n) for n = 646792397 and 646792406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6467875 + ... + 6467974.

Almost surely, 2^646792450 is an apocalyptic number.

646792450 is a deficient number, since it is larger than the sum of its proper divisors (556241600).

646792450 is a wasteful number, since it uses less digits than its factorization.

646792450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12935861 (or 12935856 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The square root of 646792450 is about 25432.1145404781. The cubic root of 646792450 is about 864.8118806386.

The spelling of 646792450 in words is "six hundred forty-six million, seven hundred ninety-two thousand, four hundred fifty".