646479535 has 16 divisors (see below), whose sum is σ = 844845120. Its totient is φ = 472032000.

The previous prime is 646479529. The next prime is 646479557. The reversal of 646479535 is 535974646.

It is a happy number.

It is not a de Polignac number, because 646479535 - 2³ = 646479527 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50091 + ... + 61660.

It is an arithmetic number, because the mean of its divisors is an integer number (52802820).

Almost surely, 2^646479535 is an apocalyptic number.

646479535 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

646479535 is a deficient number, since it is larger than the sum of its proper divisors (198365585).

646479535 is a wasteful number, since it uses less digits than its factorization.

646479535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111858.

The product of its digits is 2721600, while the sum is 49.

The square root of 646479535 is about 25425.9618303812. The cubic root of 646479535 is about 864.6723942332.

The spelling of 646479535 in words is "six hundred forty-six million, four hundred seventy-nine thousand, five hundred thirty-five".