654063331561 has 16 divisors (see below), whose sum is σ = 669780288000. Its totient is φ = 638502916608.

The previous prime is 654063331463. The next prime is 654063331567. The reversal of 654063331561 is 165133360456.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 654063331561 - 2⁹ = 654063331049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654063331567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51482536 + ... + 51495238.

It is an arithmetic number, because the mean of its divisors is an integer number (41861268000).

Almost surely, 2^654063331561 is an apocalyptic number.

It is an amenable number.

654063331561 is a deficient number, since it is larger than the sum of its proper divisors (15716956439).

654063331561 is a wasteful number, since it uses less digits than its factorization.

654063331561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18768.

The product of its (nonzero) digits is 583200, while the sum is 43.

The spelling of 654063331561 in words is "six hundred fifty-four billion, sixty-three million, three hundred thirty-one thousand, five hundred sixty-one".