656260163657442 has 12 divisors (see below), whose sum is σ = 1421897021257830. Its totient is φ = 218753387885808.

The previous prime is 656260163657411. The next prime is 656260163657443. The reversal of 656260163657442 is 244756361062656.

It is a happy number.

656260163657442 is a `hidden beast` number, since 6 + 5 + 6 + 2 + 6 + 0 + 16 + 3 + 6 + 574 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 634077674448201 + 22182489209241 = 25180899^2 + 4709829^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 656260163657442.

It is not an unprimeable number, because it can be changed into a prime (656260163657443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18229448990467 + ... + 18229448990502.

Almost surely, 2^{656260163657442} is an apocalyptic number.

656260163657442 is an abundant number, since it is smaller than the sum of its proper divisors (765636857600388).

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

656260163657442 is a wasteful number, since it uses less digits than its factorization.

656260163657442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36458897980977 (or 36458897980974 counting only the distinct ones).

The product of its (nonzero) digits is 261273600, while the sum is 63.

The spelling of 656260163657442 in words is "six hundred fifty-six trillion, two hundred sixty billion, one hundred sixty-three million, six hundred fifty-seven thousand, four hundred forty-two".