646580054 has 8 divisors (see below), whose sum is σ = 974744400. Its totient is φ = 321665256.

The previous prime is 646580047. The next prime is 646580093. The reversal of 646580054 is 450085646.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 811889 + ... + 812684.

It is an arithmetic number, because the mean of its divisors is an integer number (121843050).

Almost surely, 2^646580054 is an apocalyptic number.

646580054 is a deficient number, since it is larger than the sum of its proper divisors (328164346).

646580054 is a wasteful number, since it uses less digits than its factorization.

646580054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624774.

The product of its (nonzero) digits is 115200, while the sum is 38.

The square root of 646580054 is about 25427.9384535986. The cubic root of 646580054 is about 864.7172069433.

The spelling of 646580054 in words is "six hundred forty-six million, five hundred eighty thousand, fifty-four".