656242140630 has 32 divisors (see below), whose sum is σ = 1575330914304. Its totient is φ = 174959040096.

The previous prime is 656242140613. The next prime is 656242140649. The reversal of 656242140630 is 36041242656.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2291542 + ... + 2561961.

It is an arithmetic number, because the mean of its divisors is an integer number (49229091072).

Almost surely, 2^656242140630 is an apocalyptic number.

656242140630 is an abundant number, since it is smaller than the sum of its proper divisors (919088773674).

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

656242140630 is a wasteful number, since it uses less digits than its factorization.

656242140630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4858020.

The product of its (nonzero) digits is 207360, while the sum is 39.

The spelling of 656242140630 in words is "six hundred fifty-six billion, two hundred forty-two million, one hundred forty thousand, six hundred thirty".