646135049 has 8 divisors (see below), whose sum is σ = 738598080. Its totient is φ = 553711536.

The previous prime is 646135037. The next prime is 646135057. The reversal of 646135049 is 940531646.

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

It is a de Polignac number, because none of the positive numbers 2^k-646135049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (646155049) 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 7 ways as a sum of consecutive naturals, for example, 47042 + ... + 59204.

It is an arithmetic number, because the mean of its divisors is an integer number (92324760).

Almost surely, 2^646135049 is an apocalyptic number.

It is an amenable number.

646135049 is a deficient number, since it is larger than the sum of its proper divisors (92463031).

646135049 is a wasteful number, since it uses less digits than its factorization.

646135049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19759.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 646135049 is about 25419.1866313618. The cubic root of 646135049 is about 864.5187825350.

The spelling of 646135049 in words is "six hundred forty-six million, one hundred thirty-five thousand, forty-nine".