654525881522 has 6 divisors (see below), whose sum is σ = 981790538493. Its totient is φ = 327262368692.

The previous prime is 654525881521. The next prime is 654525881549. The reversal of 654525881522 is 225188525456.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 584993992801 + 69531888721 = 764849^2 + 263689^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=572069.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (654525881521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 858104 + ... + 1430172.

Almost surely, 2^654525881522 is an apocalyptic number.

654525881522 is a deficient number, since it is larger than the sum of its proper divisors (327264656971).

654525881522 is an frugal number, since it uses more digits than its factorization.

654525881522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1144140 (or 572071 counting only the distinct ones).

The product of its digits is 7680000, while the sum is 53.

The spelling of 654525881522 in words is "six hundred fifty-four billion, five hundred twenty-five million, eight hundred eighty-one thousand, five hundred twenty-two".