646550076 has 12 divisors (see below), whose sum is σ = 1508616872. Its totient is φ = 215516688.

The previous prime is 646550057. The next prime is 646550077. The reversal of 646550076 is 670055646.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646550077) 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 3 ways as a sum of consecutive naturals, for example, 26939575 + ... + 26939598.

Almost surely, 2^646550076 is an apocalyptic number.

It is an amenable number.

646550076 is an abundant number, since it is smaller than the sum of its proper divisors (862066796).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646550076 is a wasteful number, since it uses less digits than its factorization.

646550076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53879180 (or 53879178 counting only the distinct ones).

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 646550076 is about 25427.3489770365. The cubic root of 646550076 is about 864.7038428374.

The spelling of 646550076 in words is "six hundred forty-six million, five hundred fifty thousand, seventy-six".