646154026 has 32 divisors (see below), whose sum is σ = 1135959552. Its totient is φ = 269905920.

The previous prime is 646154023. The next prime is 646154039. The reversal of 646154026 is 620451646.

It is a junction number, because it is equal to n+sod(n) for n = 646153982 and 646154000.

It is not an unprimeable number, because it can be changed into a prime (646154023) 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 15 ways as a sum of consecutive naturals, for example, 167196 + ... + 171016.

It is an arithmetic number, because the mean of its divisors is an integer number (35498736).

Almost surely, 2^646154026 is an apocalyptic number.

646154026 is a deficient number, since it is larger than the sum of its proper divisors (489805526).

646154026 is a wasteful number, since it uses less digits than its factorization.

646154026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 646154026 is about 25419.5599096444. The cubic root of 646154026 is about 864.5272460970.

The spelling of 646154026 in words is "six hundred forty-six million, one hundred fifty-four thousand, twenty-six".