646654130 has 8 divisors (see below), whose sum is σ = 1163977452. Its totient is φ = 258661648.

The previous prime is 646654103. The next prime is 646654133. The reversal of 646654130 is 31456646.

It can be written as a sum of positive squares in 2 ways, for example, as 646532329 + 121801 = 25427^2 + 349^2 .

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

It is not an unprimeable number, because it can be changed into a prime (646654133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32332697 + ... + 32332716.

Almost surely, 2^646654130 is an apocalyptic number.

646654130 is a deficient number, since it is larger than the sum of its proper divisors (517323322).

646654130 is a wasteful number, since it uses less digits than its factorization.

646654130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64665420.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 646654130 is about 25429.3949987018. The cubic root of 646654130 is about 864.7502280392.

The spelling of 646654130 in words is "six hundred forty-six million, six hundred fifty-four thousand, one hundred thirty".