656043664064 has 28 divisors (see below), whose sum is σ = 1358438242224. Its totient is φ = 313760012544.

The previous prime is 656043664013. The next prime is 656043664069. The reversal of 656043664064 is 460466340656.

It is a happy number.

It is a super-3 number, since 3×656043664064³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (656043664069) 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, 222839447 + ... + 222842390.

It is an arithmetic number, because the mean of its divisors is an integer number (48515651508).

Almost surely, 2^656043664064 is an apocalyptic number.

656043664064 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

656043664064 is an abundant number, since it is smaller than the sum of its proper divisors (702394578160).

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

656043664064 is a wasteful number, since it uses less digits than its factorization.

656043664064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445681872 (or 445681862 counting only the distinct ones).

The product of its (nonzero) digits is 7464960, while the sum is 50.

The spelling of 656043664064 in words is "six hundred fifty-six billion, forty-three million, six hundred sixty-four thousand, sixty-four".