656198891656 has 96 divisors (see below), whose sum is σ = 1583290477440. Its totient is φ = 249426144000.

The previous prime is 656198891641. The next prime is 656198891657.

656198891656 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (656198891657) 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 23 ways as a sum of consecutive naturals, for example, 903180 + ... + 1458811.

It is an arithmetic number, because the mean of its divisors is an integer number (16492609140).

Almost surely, 2^656198891656 is an apocalyptic number.

It is an amenable number.

656198891656 is an abundant number, since it is smaller than the sum of its proper divisors (927091585784).

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

656198891656 is a wasteful number, since it uses less digits than its factorization.

656198891656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2362067 (or 2362052 counting only the distinct ones).

The product of its digits is 167961600, while the sum is 70.

The spelling of 656198891656 in words is "six hundred fifty-six billion, one hundred ninety-eight million, eight hundred ninety-one thousand, six hundred fifty-six".