656627703228 has 72 divisors (see below), whose sum is σ = 1980305787600. Its totient is φ = 187607913696.

The previous prime is 656627703223. The next prime is 656627703287. The reversal of 656627703228 is 822307726656.

656627703228 is a `hidden beast` number, since 6 + 5 + 6 + 627 + 7 + 0 + 3 + 2 + 2 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656627703223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 62034363 + ... + 62044946.

It is an arithmetic number, because the mean of its divisors is an integer number (27504247050).

Almost surely, 2^656627703228 is an apocalyptic number.

It is an amenable number.

656627703228 is an abundant number, since it is smaller than the sum of its proper divisors (1323678084372).

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

656627703228 is a wasteful number, since it uses less digits than its factorization.

656627703228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124079336 (or 124079321 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 54.

The spelling of 656627703228 in words is "six hundred fifty-six billion, six hundred twenty-seven million, seven hundred three thousand, two hundred twenty-eight".