656213215152 has 120 divisors (see below), whose sum is σ = 1863780710400. Its totient is φ = 198805270400.

The previous prime is 656213215123. The next prime is 656213215157. The reversal of 656213215152 is 251512312656.

It is a super-3 number, since 3×656213215152³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 656213215152.

It is not an unprimeable number, because it can be changed into a prime (656213215157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30370849 + ... + 30392447.

It is an arithmetic number, because the mean of its divisors is an integer number (15531505920).

Almost surely, 2^656213215152 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 656213215152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (931890355200).

656213215152 is an abundant number, since it is smaller than the sum of its proper divisors (1207567495248).

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

656213215152 is a wasteful number, since it uses less digits than its factorization.

656213215152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26863 (or 26846 counting only the distinct ones).

The product of its digits is 108000, while the sum is 39.

The spelling of 656213215152 in words is "six hundred fifty-six billion, two hundred thirteen million, two hundred fifteen thousand, one hundred fifty-two".