656201623056 has 160 divisors (see below), whose sum is σ = 1945875456000. Its totient is φ = 186662942208.

The previous prime is 656201623039. The next prime is 656201623057. The reversal of 656201623056 is 650326102656.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 656201622999 and 656201623017.

It is not an unprimeable number, because it can be changed into a prime (656201623057) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186049165 + ... + 186052691.

It is an arithmetic number, because the mean of its divisors is an integer number (12161721600).

Almost surely, 2^656201623056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 656201623056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (972937728000).

656201623056 is an abundant number, since it is smaller than the sum of its proper divisors (1289673832944).

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

656201623056 is a wasteful number, since it uses less digits than its factorization.

656201623056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5821 (or 5815 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 656201623056 in words is "six hundred fifty-six billion, two hundred one million, six hundred twenty-three thousand, fifty-six".