646146099 has 32 divisors (see below), whose sum is σ = 979848000. Its totient is φ = 420698880.

The previous prime is 646146077. The next prime is 646146121. The reversal of 646146099 is 990641646.

It is an interprime number because it is at equal distance from previous prime (646146077) and next prime (646146121).

It is not a de Polignac number, because 646146099 - 2⁹ = 646145587 is a prime.

It is not an unprimeable number, because it can be changed into a prime (646146029) 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 31 ways as a sum of consecutive naturals, for example, 244087 + ... + 246719.

It is an arithmetic number, because the mean of its divisors is an integer number (30620250).

Almost surely, 2^646146099 is an apocalyptic number.

646146099 is a deficient number, since it is larger than the sum of its proper divisors (333701901).

646146099 is a wasteful number, since it uses less digits than its factorization.

646146099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2852 (or 2846 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 646146099 is about 25419.4039859317. The cubic root of 646146099 is about 864.5237107503.

The spelling of 646146099 in words is "six hundred forty-six million, one hundred forty-six thousand, ninety-nine".