656387783656 has 16 divisors (see below), whose sum is σ = 1342611375840. Its totient is φ = 298358083440.

The previous prime is 656387783641. The next prime is 656387783659.

656387783656 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (656387783659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3729475956 + ... + 3729476131.

It is an arithmetic number, because the mean of its divisors is an integer number (83913210990).

Almost surely, 2^656387783656 is an apocalyptic number.

It is an amenable number.

656387783656 is an abundant number, since it is smaller than the sum of its proper divisors (686223592184).

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

656387783656 is a wasteful number, since it uses less digits than its factorization.

656387783656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7458952104 (or 7458952100 counting only the distinct ones).

The product of its digits is 914457600, while the sum is 70.

The spelling of 656387783656 in words is "six hundred fifty-six billion, three hundred eighty-seven million, seven hundred eighty-three thousand, six hundred fifty-six".